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.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

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

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

A terrific purveyor of natural history objects and curios.

Make a tough dinner decision: Octopus wasabi roulette or bull penis?

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

This unique eatery offers a taste of Estonia's "Onion Route."

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

A series of concentric circles represented a bold new experiment in socialist urban planning, and it notoriously difficult to get around.

A statue of the Soviet leader still stands in a quiet corner of Estonia’s most Russian city.

This ornate church has survived Nazi and Soviet occupation, including a short stint as a Soviet-era gymnasium and cinema.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

Troublesome students were detained in this tiny graffiti-covered university jail.

For the last century, this international border within a small town has appeared and disappeared various times.

The medieval network of canals hidden underneath the city is opened to explorers each year.

Beloved children's TV characters freckle the German city's streets.

This magnificent Art Deco church is a reflection of Lithuania’s turbulent history.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

Explore the dark underground corridors of this graffiti-covered former military fortification.

Relics from an era long gone, sit idle outside this Estonian museum.