Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A boulder carved into the shape of the cosmonaut's head.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

Christ's blood preserved in a Belgian town.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

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

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

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.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Whitewashed mosque contains the world's largest carpet.

This beautifully restored fortification kept the city safe for centuries.

An imposing Omani fortress surrounded by date palm trees.

Gargoyle head that brings good luck.

Inat Kuća, or "House of Spite," is more than just an oddly named restaurant.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

Oriental bazaar in the heart of Sarajevo.

The haunting ruins of a military fortress turned astronomical observatory sit on a Sarajevo mountaintop.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

A war-torn Olympic relic is being overtaken by graffiti and nature.