This region of Slovakia boasts some of the most plentiful opal mines in the world.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

A once-fairy tale mansion now stands in a state of disrepair.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

The world's newest astronomical clock is also its most accurate.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

A unique hotel for the artistic soul.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

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

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A technicolor place of worship for Elevationists.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A mega theme park-wax museum mélange containing all things biblical.

St. Augustine's record-setting narrow street was designed to protect against pirates.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

An abandoned water sports stadium that has become a haven for graffiti and decay.

An oddities shop that dabbles in the deathly and beautiful.

Town of spiritualists and mediums in Florida.

This home is decked out like a psychedelic explosion of colors and bowling balls.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

An underwater city for the dead.

Where manatees are the snowbird vacationers in these balmy Florida springs.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.