Gargantuan home of Russian science.

This massive monument honors the first human in space.

Some Moscow residents once claimed the bizarre, contorted mass of metal on top of the building was used to manipulate minds.

Dozens of padlock-trees along the Moscow River.

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

The tallest hotel in Europe.

Moscow's imposing monument to the Space Age.

Back in the tiny USSR.

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

Former headquarters of the KGB.

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

Museum celebrating the achievements of the Soviet space program.

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

Thanks to a spelling mistake this bizarre beaver-tiger hybrid became the symbol of a Siberian town.

Intricate wood carvings on an island in Siberia.

The pedestrian traffic signals in Brazil's teeming metropolis light up with clues to nearby landmarks.

This majestic building, where Brazil's coffee brokers once bought and sold beans, now houses a coffee museum.

Ella Fitzgerald, opera singer Enrico Caruso, and dancer Isadora Duncan all performed in this lavish, supposedly haunted theater.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

A 125-meter long "tribute to the Brazilian people."

Catch a scenic view of Warsaw's Old Town from the top of a centuries-old dumping ground.

This lakeside bunker complex in Mamerki, Poland, housed the Supreme Military Command of Nazi Germany during World War II.

Built to transport German U-boats through the never-completed Masurian Canal, the locks near this Polish village are now home to a rope course.