This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Go inside a revolutionary, cage-less zoo where 70 species of monkeys roam free alongside their human visitors.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

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

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

Rare karst landscape eroded from a flat seabed.

A long-buried ancient ruin unearthed right in the middle of the city.

The sunlight passing through the opening of this huge cave system creates a magical effect.

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

A New York–based physician returned home to Spain to build his own elaborate monument to Christopher Columbus.

A 16th-century Andalusian palace.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

An impressive bridge over a ravine also served as an aqueduct.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

The hairpin turns in this mountain road take the shape of a letter—is it a coincidence or a symbol of love?

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

The only known mosaic depicting the Greek god of sleep, Hypnos.

Its frescoes depict the likeness of Marshal Tito, Karl Marx, and Friedrich Engels burning in hell.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

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