Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

A bright little alley in La Boca is a part of tango history.

A black cat protests the City Guild in Riga's Old Town.

The oldest housing complex in Riga is a mini timeline of architectural trends.

3,000 market stands in five former Zeppelin hangars.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

An alien church provides much needed silence in the midst of a Finland shopping center.

Mysterious craters may have been home to an ancient cult.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

A museum dedicated to the history and exploration of both popular music and science fiction.

999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

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

Mysterious 500-year-old tapestries depict a unicorn hunt.

Peek through the gates at this oasis from the city, full of Old English charm.

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

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

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

This little museum is built on a theater that was once a wildly elaborate speakeasy.

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

Order scoops of pandan, lychee, and black sesame at this family-run institution.