This Legendary Underground Mansion Is on the Market for $18 Million. Take a Look Inside

There's an $18 million house on the market just a few miles east of the Las Vegas strip — but you have to look 26 feet underground to find it. A nearly 15,000-square-foot bunker designed to look like the world above is on the market at 3970 Spencer St.

Courtesy of Stephan LaForge

This luxury subterranean house isn't your typical bunker. The underground space, which is attached to a smaller house at surface level, features a family home decked out in '70s style, as well as a mock backyard, a pool and a guest house, according to the home's real estate listing. There's no natural sunlight, but the home's faux-sky mimics morning, noon and night — complete with sparkling stars — depending on time of day. As for nature, murals of green pastures, forests and mountains decorate the walls.

Envisioned by Avon executive and underground living enthusiast Girard Henderson, the home was designed to provide luxury in the event of nuclear war, according to the Underground House of Las Vegas Collection at the University of Nevada. A majority shareholder of Underground World Homes, a construction company that specialized in subterranean living, Henderson helped bring the vision of underground living to the grounds of the 1964 New York World's Fair. Henderson lived in the home, which was completed in 1978, until he died in 1983, according to the University collections.

Since then, the five-bedroom, six-bathroom home has become something of a Las Vegas legend — so much so that it was the most-viewed home on Realtor.com last week. The home's listing agent, Stephan LaForge, says he's gotten a lot of calls in the two weeks the home has been on the market, but not necessarily from qualified buyers. "There's been lot of interest in the sense that people want to look at it," LaForge says. "It's like an attraction, like going to Disneyland."

That said, the average person might find going to Disneyland a little more affordable than buying the home, which last sold for $1.15 million in 2014. "$18 million sounds crazy based on previous sales costs," LaForge says, "but if you were going to build one today, think about digging the hole and waterproofing the concrete."

If you're just interested in taking a peek inside the home, check out the photos below.

The yard isn't much to see at surface level

Courtesy of Stephan LaForge

Courtesy of Stephan LaForge

But the underground landscape is a whole different story

Courtesy of Stephan LaForge

The replica yard comes complete with greenery, nature murals and lights that simulate the time of day.

Courtesy of Stephan LaForge

Courtesy of Stephan LaForge

Courtesy of Stephan LaForge

The yard comes with other luxuries, too, like an in-ground pool

Courtesy of Stephan LaForge

...and a grill disguised as a rock.

Courtesy of Stephan LaForge

Certain parts of the house, like the pink kitchen, seem preserved in time

Courtesy of Stephan LaForge

Courtesy of Stephan LaForge

The property comes with five bedrooms and six bathrooms

Courtesy of Stephan LaForge

Courtesy of Stephan LaForge

Courtesy of Stephan LaForge

And is outfitted with a bar, pool table and disco ball.

Courtesy of Stephan LaForge

Courtesy of Stephan LaForge

Courtesy of Stephan LaForge