Museum celebrating the achievements of the Soviet space program.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

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

Dark, eerie exhibits make for a surreal exploration of the subconscious.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

An incredibly random collection of wax figures is displayed in a shopping center walkway.

This Russian museum stresses the importance of keeping clean and even holds one of Pavlov's dogs.

The London statue that imitates passersby.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

Murals of the wild parties once held on the frozen River Thames.

A relic from one of London's worst 19th-century slums.

A little slice of Japan and its aesthetics in London's Holland Park.

A tongue-in-cheek arcade where the games are based on everyday life.

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

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

A unique tribute to the millions of animals who served and died for the British military.

Black cat statues guard this temple-like Egyptian revival factory.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.