More holes in the ground...OR,
Tour a decommissioned cold war underground missle complex.
This would be an excellent "thing to do when you're bored" were it not for the violation of US Federal Trespassing Laws and risk of exposure to radon, asbestos and other nasties
Standing at the entrance, which looks like an emergency access hatch. The real staircase down into the complex was sealed off, and is under the metal lid in the foreground. To the left you can see the edge of the pad forming the doors to the main elevator shaft. The doors weigh MANY tons. Numerous efforts have been made to re-seal the entrance, but vandals and explorers still manage to break in.To take the tour, click HERE.