This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

These azure waters were thought to lead to the Mayan Underworld.