The fairy tale castle of the "fairy-tale king."

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

A striking 12th-century-style castle built on the edge of a cliff.

The prototype for all Nazi concentration camps.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

A little sculpture with a large wardrobe.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Museum preserving torture methods from the past.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

This bone-filled cave got its name after they found 140 bear skeletons inside.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

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

New Orleans' famous cemetery, located on the site of a former race track.

"They died with their boots on."

This museum showcases the history and contributions of the U.S. Army to the medical industry, both on the battlefield and off.

Established in 1925, Kiddie Park claims to be the oldest amusement park in the U.S. - a cozy little time warp nestled in a shady corner of the modern world.

This lava formation earned its whimsical name from the log-like formation of it stones.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An architect's childhood fantasy treehouse made real.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.