The old observatory in Copenhagen has a spiral corridor used as a racetrack.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

The home of the Dead Sea Scrolls is an abstract modernist dream.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

A fortified city, home to a remaining population of five families

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

The "Prussian Versailles" that is as glorious today as when it was built.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

The loneliest plant in the world resides at the Durban Botanic Gardens...mostly.

Christ's blood preserved in a Belgian town.

Visitors to this Belgium graveyard are greeted by the grieving stone parents of the young men lost to war.

A moving memorial to the fallen and missing from WWI trenches.

Museum in a swimming pool where the water still flows.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

It houses the remains of a 17th-century version of the Titanic.