A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

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

2300-year-old Roman road connecting the empire.

The yawning maw of this pagan visage is said to bite off the hands of liars.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

Alien rock formations grown from the sands of an Australian national park.

An extraordinary "City of Caves" carved from solid stone.

World's most expensive home.

One part local history, 99 parts gruesome haunted house.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

This 19th century cyclorama acts like an analogue time machine to a different era.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

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

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

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

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

A small but immensely extravagant palace built by the "Night King."

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

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This single room has survived the centuries with almost no deterioration.

The skeleton of a whale that beached itself in this Irish town is now on display in their public park.

Modest by day, illuminated majestically at sunset.