The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

Rumored to have been frequented by Vincent van Gogh, it's the only remaining genever producer in the Hague.

Moscow's imposing monument to the Space Age.

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

Gargantuan home of Russian science.

The tallest hotel in Europe.

Former headquarters of the KGB.

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

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

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

Intensely colorful calcite pools in Southern China.

At 16,627 feet above sea level, this unstaffed station is the highest in the world.

The highest monastery in the world operates a tiny guesthouse with doors open to all.

This Tibetan monastery has survived multiple attacks and is also a sky burial site.

Snow-capped peaks, colorful waterfalls and stunning vistas on the edge of the Himalayas.

Natural arch offers panoramic views of Yangshuo's karst hills.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This annual harvest parade features intricate floats covered with fruits, vegetables, and seeds.

The first patented shaved-ice machine heralded a snowy wonderland of iced treats at a favorite New Orleans summer shack.

The mountaintop wind turbine boasts a viewing deck — and a fair share of controversy.

A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Sweden's first electric elevator remains hidden within a fortress-like building.