A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The largest self-built castle in the U.S., six decades in the making.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Take a hidden path to the mouth of the cave to watch millions of bats swarm at sunset.

Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.

A former French military respite turned jungle tourism hotspot.

A battle between nature and architecture in the Cambodian jungle.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

This picturesque medieval monastery guards a small trove of historic treasures.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

An ethereal glowing blue ocean cave in Croatia.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

This cavern was used as a hidden hospital and safe house during the Vietnam War.

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

World's largest cave was only discovered in 1991, and now offers tours to the public.

A nightmare for the claustrophobic lies hidden in Southeast Asia.