Eighty million natural history specimens call this gargantuan museum home.

A fountain standing as a testament to a doomed alliance.

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

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

Large miniature theme park with 100-plus models.

Source for a sizable portion of Egypt's freshwater supply is more than an optical illusion.

A little sculpture with a large wardrobe.

An ancient knight and a symbol of the city's freedom.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

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

A beautiful maze marks where three countries meet.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A cluttered and astounding collection of antiquities and curiosities.

Hundreds of hidden passageways weave through the old quarters of Lyon.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

Gargantuan home of Russian science.

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

The tallest hotel in Europe.

Home of the future Emperors of Russia.

Stalinist skyscraper built with help of cryotechnology.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

A church of bones, decorated with 40,000 human skeletons.

Macabre astrological automaton clock dating to the late 1400s.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."