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.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

One of only two commuter aerial tramways in the United States.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.