Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Now containing the bones of the actual conquistador, instead of someone else.

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

Every equinox this Maya pyramid puts on a spooky ancient light show.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

The celebrated eyesore created by starry-eyed sweethearts.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

Inside, ancient treasures. Outside, modern contradictions.

An abandoned munitions factory with a shot tower continues to wage war on the surrounding environment.

A castle built by an eccentric medieval enthusiast in rural Ohio.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.