This historic hotel invented the chocolate brownie.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

These pretty kitties killed and ate as many as 135 railway workers.

Years of archaeology, just chillin' by the water cooler.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

Gargantuan home of Russian science.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

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

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

Former headquarters of the KGB.

Moscow's imposing monument to the Space Age.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

This luxury shopping lane has been protected by its own tiny police force for over a century.

This one has sailed five times as far as Sir Francis Drake's famous ship.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

Eighty million natural history specimens call this gargantuan museum home.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.