The system of air guns are fired off remotely to scare any trespassing avians.

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

Exact replica of the ancient monument, but much, much lighter.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Dramatic river bend surrounds a natural red-rocked pedestal.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Most-visited and most-photographed slot canyon in the American Southwest.

This massive swimming pool is the high tech home to the human-powered submarine races.

These unusual rooms on wheels are holdovers from the 1960s.