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

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

3,000 market stands in five former Zeppelin hangars.

This centuries-old rooster survived a devastating fire.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

Sweden's oldest animated sign is still lighting up the skyline today.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Sweden's "good old days" painstakingly re-created in a model village.

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

The bronze uniforms commemorate the vital role of women during World War II.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This sculpture of disembodied body parts forms a poignant memory of the horrors of World War II.

This giant sculpture made of trash is a critique of society's wastefulness.

It's a mystery how these curious columns wound up in an Edinburgh suburb.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

The last Victorian market in Belfast.

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

An abandoned masterpiece of Soviet Brutalist architecture.

Originally built to monitor fishing, this Victorian tower now educates visitors about the local salmon industry.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.