One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

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

A preserved oak tree about 3,500 years old found in Riga, Latvia.

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

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.

This one-time health resort was used by aristocrats around the world.

A whimsical bridge adorned with decorative dragons.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

An ancient knight and a symbol of the city's freedom.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

Gargoyle head that brings good luck.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

A tiny church on a man-made island in the Adriatic.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Three underground crypts and a pointed arch under the bell tower make this cathedral unique among Romanesque churches.