Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

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

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

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

A fantastic Christmas tradition where defecation meets the manger.

Spain's stunning solar energy plant.

This cemetery features modernist statues as strange as its name.

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

A trash dump made beautiful by nature's power.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Canyon walls shrouded in ferns.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

This abandoned motel doesn't welcome guests anymore, but decay and a creepy atmosphere still call it home.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

This little slice of old Jerusalem in Oklahoma is the evolution of a century-old passion play.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

Nature's biggest mammal swims in landlocked Oklahoma.