Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

The construction of a tram line unveiled hidden remnants of the old medieval city.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

Twisted buildings adorn the banks of the Rhine river.

This futuristic German television spire is actually the world's largest digital clock.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The former hotel where Tesla invented the radio.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Visit the monolithic tomb of America's most famous general.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This abandoned subway station can still be seen on regular commuter trips.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

A popular European tradition makes its way to the states on one of America's most famous bridges.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Tucked away amidst some of the most famous addresses in the world is New York’s only fraction of a street.