Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

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

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Amsterdam's former hotspot for public executions and dissections.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

Nature and art meet in this curvy creation

This stately clubhouse has showcased German-American culture for over a century.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Where commuters walk through remnants of an ancient Greek necropolis.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

This grand gothic brewery has been pumping out suds for over a hundred years.

Remarkably realistic Florida shoal bass "swim" inside this large globoid sculpture.

Electrical pylon in the shape of Disney's beloved mouse.

Trinkets and toys lovingly handmade by maximum security prisoners.

This Cape Cod museum exhibits what it claims is the only authenticated pirate treasure in the world.

This delicate museum is devoted to the art and industry that once supported Cape Cod's oldest town.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.