L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

A magnificent, reportedly haunted mansion built for a composer by Spiritualists.

This historic graveyard was partially paved over to create a streetcar line.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

Lemon Grove, California is known for its giant lemon...and mummified bodies.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

A silly medieval mural preserved on the side of a Viennese house.

A spherical "micro-nation" in the heart of Vienna.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Op-art architecture designed for happiness.

Legends surround an ancient tree trunk riddled with nails for good luck.

Baroque celebration of the end of the Great Plague of Vienna.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

Walk through Czech history in Prague's largest graveyard.

Two stunning 17th-century libraries and a cabinet of curiosities.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

Be(w)ar(e) the moat around this historic Czech castle.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

The first museum in the world devoted to sexual gadgetry.