MONTGOMERY, Texas -- In an exclusive report Friday night, News2Houston uncovered that a secret shelter that holds thousands is for sale in Montgomery County.

You can't see it from the highway, you can't see it from the sky, even when you're on top of it you don't know it's there.

But just off Highway 105, near Montgomery, sits a secret few know about, and even fewer have seen.

"I had no idea we'd have something like this underground in Montgomery, Texas," real estate consultant Gary Goff said.

The underground facility is a secure, independently powered nuclear bomb shelter.

It's a 38,000-square-foot survival center where more than 1,000 people could live for months, because it's prepared for almost everything, including a hospital, a morgue, and even four prison cells.

"The bomb shelter is designed to withstand a 25-megaton nuclear explosion within four miles," Goff said.

The bunker was built in 1984 by Louis Kung, a wealthy oil producer who defected from China.

Kung was worried about a nuclear attack from China or the Soviet Union, so he built the shelter just yards away from his company's headquarters to keep his family and employees safe.

But he kept it secret from almost everyone.

It was so secret that insiders told News2Houston that most employees never went inside the bunker.

The bunker's entrance was through two pagodas and under a gazebo. Once inside, de-contamination showers greet guests.

"Then they'd be checked for radiation by a Geiger counter that's still on the wall here," Goff said.

The two-story bunker has a large cafeteria and a sleeping dorm area downstairs, where bunk beds are stacked three-tiers high.

Designers even built more than a dozen conjugal rooms.

Kung's oil company went bankrupt in the late 80s and he later passed away.

But the bunker, along with a luxurious office building next door, is currently owned by a real estate development company.

The company plans to lease or sell the bunker and the office space.

For more information, log onto www.curtisdevelopment.com.