A memorial to the murdered Jews of Kaunas.

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

Flamboyant architecture from the turn of 20th century.

3,000 market stands in five former Zeppelin hangars.

The Guardian of Tallinn.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Pop culture has helped to keep this iconic British building from being destroyed.

Scattered throughout London are ancient remnants of the city's former bounding wall.

An unusual round church in London with a Templar past.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

Every equinox this Maya pyramid puts on a spooky ancient light show.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

The site of the climactic scene from the classic horror film is now a historic landmark.

Elevated freight railway turned wildly successful urban park.

The field of tiny caves that mark this Chinese cliffside are each their own historic Buddhist temple.

The once highest point in China blends symbolic design with a kick of adrenaline.

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

Once the private home of China’s most legendary tycoon, getting inside this stunning mansion no longer requires an elite pedigree or acts of daring.

The largest tea plantation in Southeast Asia supplies gorgeous vistas alongside tea for the surrounding countries.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

The first Catholic church in Singapore is a Neo-Gothic colossus with a rich architectural history.

Khmer Rouge's high security prison.

5,000 skulls in memorial to those killed by the Khmer Rouge.