I’m Jessi Joseph. And I’m Ray Parisi. We travel the world for CNBC, producing stories about super duper luxury real estate and some of the best homes we’ve ever visited have secret worlds hidden below ground. We’re talking about subterranean tennis courts, insane spas and underground pools. Here are four homes with underground secrets, starting with number four. St. Moritz is the winter playground of the world’s rich and famous. And nestled inside the snowy paradise is one of the most extraordinary homes in all of Switzerland. This castle was designed to make a billionaire’s jaw drop. Don’t be fooled by the glass and stone chalet’s relatively modest exterior. This place actually has seven levels and most of them are hidden in the rocks below. We can’t tell you the name of the European magnate who moved a mountain to build this dream home. But Senada Adzem, the woman hired to sell it for $185 million, is more than willing to show us around. The owners spared absolutely no expense in making this the most incredible property in all of Switzerland. A massive, six-sided staircase with no visible support beams is insane. It is so mysterious and so luxurious that someone has to see it to believe it. The stairway leads to a room called the grand reception. On one side, 35-foot windows frame the Swiss Alps. On the other, there’s a wall covered in well, maybe I’ll let her tell you. This is actually floor-to-ceiling mink. The room’s giant doors are automatic. James Bond would feel quite at home here. And 007 would love the vanishing wall that leads to the library. It’s clad in crushed red velvet with a Bond-worthy feature hidden inside. And if you know where to touch, the secrets will reveal itself. Behind the shelves is a covert office. And just wait until you see where breakfast is served. In the breakfast nook, which also is an art installation adorned with 24-karat gold leaf. And yeah, that’s a glowing egg sculpture hanging from the ceiling. Price tag? $145,000. Before we go deeper down below, let’s check out the penthouse-level master bedroom, where automatic drapes reveal a $1.8 million sculpture outside. The floors in here are blanketed in snowy white fox fur and the massive master bath is wrapped in white onyx. At the center is a 360-degree see-through shower. I hope you’re not shy. And this is even crazier. The walk-in closet is painted from floor-to-ceiling in 24-karat gold. It was what I call supreme luxury. Now for more of the subterranean secrets buried deep below this place. Where you’ll find a wine cellar, a $1.3 million movie theater and a private ski lodge. Yeah, a ski lodge. If you come to St. Moritz, it means you love to ski. There’s a very sweet boot heating system, plus ski out access to a private chairlift. And you’ve got to go one more level down to see the unbelievable. It really rivals some of the finest spas in the best hotels in the world. There’s a Himalayan salt room lined with glowing rock walls. A modern hammam that looks like a spaceship crossed with a steam room, a high-tech shower with rainbow lighting, even an ice chamber for chilling out. And then there’s this, a subterranean pool that’s the size of a lake. And yeah, that’s me swimming in it. And right next to the pool is a giant hot tub I also got to try out. Last stop is the stone covered car cave. It’s got a $260,000 turntable with the power to spin a two and a half ton Bentley. This is one of the finest homes in the entire world. Oh, my God. That house was so next level. And the next. And the next. And the next. Now check out a California estate with secret passages that lead to a Moroccan hammam, a pool and a tennis court down below. And here’s CNBC’s Robert Frank with number three. Some of the super rich like to scream about their wealth with flashy mega mansions, but others prefer to whisper. On the outside, this may not look like an over-the-top palace, but looks can be deceiving. So we wanted to live in a destination resort every single day. We did not want to maintain multiple properties. Former television host Alex McLeod is taking us on a tour of this very unusual estate just outside of Los Angeles. She shares it with her fiance, a frozen food mogul, John Blazevich. But now they’re looking to sell it for a whopping $53 million. So Alex, you drive up to this house. It’s a nice one-story Mediterranean villa. Nice. But not that special. Really? Yeah. Really? Okay. I’m freaking out right now. Hey, look, we’re going to surprise you. This house has many secrets. The first floor is certainly opulent. Where are the secrets? Well, they’re right here, buried five stories underground and hidden by secret passageways. If you could just move this chair for me, please. Okay. Thank you very much. And more mysterious. Now I’m going to show you the subterranean surprises. The further down you go, it’s like you go back further in time. That’s right. We’re actually 20 feet below ground now and we’re in the 10th century. Well, that might be a bit of an exaggeration. Not many ancient underground Turkish spas that we know of cost $10 million to build. So this is our spa. And it rivals any world class hotel spot. Even the towels have the house name and logo. Just down the hallway, there’s an indoor pool, jacuzzi and a hot stone room. The ceiling, walls and archways are all sandstone. The blocks were constructed by 300 nomadic Moroccan tribesmen. The entire spa took eight years to build. And just like the Spanish castle that inspired the room, the spa appeals to the discriminating voyeur. This is a one-way window so we can see what’s happening in here, but you can’t see on the other side. Why was that? This is because in the 10th century, the king would be watching his maidens bathe. And he would decide who he was going to have dinner with that night. Have dinner with right? Alex’s fiance John designed and built this home and he made sure it reflected all of his passions, which include tennis, lots of tennis. Sure. There’s a clay court outside, but five stories underground, there’s an indoor tennis court that cost more than $14 million to build. Let’s just say tennis is a multi-million dollar hobby here. Some of the world’s top tennis stars like Pete Sampras have played here. The room is also fully wired for entertaining and converts into a ballroom for over 300 guests. So whoever buys this house for $53 million, they’re gonna have to be comfortable spending time underground. A portion of their time underground. And if you’re buying in LA, you want the sunshine. That’s right. I mean, we spend the majority of our time outdoors. We’re very active people. We take full advantage of our eight acres. But when we want to play a little indoor tennis or have a steam, think of it as added value. Well Jess, that looked like a fun shoot. Sure was. My favorite part was that underground pool with those crazy archways. Next up, a beach front mansion with a secret hidden underneath the front lawn. CNBC’s Robert Frank is back with number two. This almost $50 million mega mansion sits on what’s known as billionaire’s row in the ritzy beachside town of Manalapan, Florida, where it commands 315 feet of Florida’s most sought after gold coast. But what you may find even more impressive is the secret treasure you can’t see buried under that sumptuous estate’s front lawn. More on that later. First, we take you inside the nearly 40,000-square-feet of contemporary opulence where a super-sized living room delivers breathtaking views from 30-foot-tall windows. The next thing you’ll notice is a ubiquitous spirit that defines the decor, namely tequila made by the top shelf producer Patron. You’ll find Patron bottles on the bars, painted on the walls and even in almost all 16 bathrooms where the distinctive glass is filled with mouthwash. The couple that lives here has good reason to be tequila obsessed. They are Patron’s high powered CEO Ed Brown and his wife Ashley, a former fitness model and one-time Patron girl. It was always going to be like my dream home because it’s like, I love the water. I love Florida. We wake up to the dream every day. This dream house features nine bedrooms. The master suite includes a sitting room for her and another for him, a king-sized view of the Atlantic. Plus, walk-in closet for him and a mega walk-in closet for her. 1,500-square-feet of high fashion on display. I’m still pinching myself. I cannot believe this is my closet. Back in 2013, Ed and Ashley bought the mansion for $15 million, then spent three and a half years on a massive renovation. Now they’re selling. Asking price? $48.9 million. This house just is incredible. It’s big for two people. I want to go back to something a little bit smaller and simpler. There is nothing small or simple about the saltwater pool with a rushing waterfall that cost a cool million. And you won’t believe what’s buried underground. So underneath us is my man cave. There’s a man cave right underneath our feet? Yes, sir. You’ve got to show me this. Below the faux lawn, two professional race cars. A Ferrari 458 that reaches the top speed of 180 miles an hour. And this Le Mans prototype called the LNP2. It’s 230. They’re each worth millions. Ed and his racing team drove both cars to wins at two of America’s top endurance races. Also in the fantasy hideaway, one of the CEO’s favorite toys, a professional driving simulator worth a hefty $50,000. And obviously the bar is stocked with plenty of Patron, including this bottle bedazzled by rapper Lil Jon. And an $8,000 bottle of limited edition tequila served in crystal, which Ed believes is the best way to toast this spectacular space. Here’s to the house that Patron built. Cheers. Thank you very much for coming. Ray, did you get to do a tequila shot on that shoot? Maybe two. Okay. Three. That sounds about right. Now for the LA mansion with gold covered cars and an underground swimming pool. Here’s number one. The first thing you’ll notice at this nearly $80 million mansion in Beverly Hills is gold. It’s everywhere. It’s on the gates in the driveway. This sculpture in that water feature at the front entrance. And there’s even more inside. Yep. The developer built a Cristal room filled with $100,000 worth of gold champagne. And yes, that’s a golden champagne gun. This place has state of the art everything. A retractable glass wall that reveals the 85-foot infinity pool and a flat-screen TV that drops from the ceiling and spins around. But the coolest feature of this nearly 21,000-square-foot mansion is what’s hidden underground. There’s a second swimming pool with a waterfall that gets sunlight from the top floor. So you could actually get sunburnt in the basement. Down below, there’s also hot and cold plunge pools and hidden behind a soothing wall of bubbles, a massage room. And for the ladies, there’s a beauty salon just off the basement gym. But if that doesn’t rev you up, check out what’s in the garage. The owner’s gold covered rides. Unfortunately, those are not included in the $80 million price tag. Houses in Los Angeles are so freaking cool. What was your favorite underground world out of all those houses you just saw? I’m going to go with that California estate that has that crazy Moroccan hammam. I would do the St. Moritz house because that giant pool underground totally blew me away. Tell us your favorites in the comments. And don’t forget to follow. Subscribe like, you know, all that stuff.