This massive crater in the middle of nowhere was used to train astronauts for moon landings.

This historic estate on the east shore of Lake Tahoe was home to an eccentric millionaire (and his pet elephant, Mingo).

An 1870s ranch for pioneers, rodeo stars, and divorcees was abandoned and left for dead, until the city reopened it for exploration.

A new kind of theme park for adults off the Las Vegas Strip.