This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

The ancient latrines of the Greeks, in all their public glory.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

A fountain standing as a testament to a doomed alliance.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The Guardian of Tallinn.

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

The reconstruction of this prominent building fulfilled a long-written command.

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.

Flamboyant architecture from the turn of 20th century.

3,000 market stands in five former Zeppelin hangars.

One of the world’s most colorful cemeteries, where each pigment is symbolic.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

This little replica of Lady Liberty provides a bit of NYC in a Japanese city.

This isolated Japanese mountain village untouched by time showcases unique and stunning traditional architecture.

The quintessential Japanese rock garden has existed for more than 500 years.

This Japanese national treasure was originally built in 593.

This Buddhist temple is home to the graves of the Japanese national legends, the 47 Ronin.