The beautiful, ornate weather station is the most popular geocache in Salzburg.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

A museum marks and documents the site of the Titanic's launch.

This tribute to the 16th-century composer is now an unusual shrine to Michael Jackson.

The scars of World War II are preserved on its walls.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

Tiny castle in the middle of the Rhine made you pay to pass.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

Carved fountains poignantly placed in parks and in front of special monuments.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

The prototype for all Nazi concentration camps.

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

The world's oldest known salt mine.

An Austrian house of bones filled with hundreds of intricately painted skulls.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

A massive sea stack famous for its appearance in The Goonies.

It's good luck to be mocked by this monkey.

Two stone columns flank the grand Venice square, but there were supposed to be three.