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

Ancient barriers wrap around what was once an important stop along the Silk Road.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.