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

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

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

Twelve hundred stone carvings guard this off-the-beaten-path Buddhist temple.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

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

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

A beautiful maze marks where three countries meet.

Cat art as far as the eye can see.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The home where the first Premier of the People's Republic of China worked and lived.

The birthplace of modern China.

A prestigious learning institute of old Shanghai.

Although resembling a grand Buddhist temple, this structure is actually the largest mosque in China.

The powerful party began with a secret meeting in this shikumen in 1921.

A tidal bore with its own festival.

One of the word's deepest gorges is also tied to a fantastic legend.

This tunnel looks like a sliver of Shanghai that's stuck in the past.

A wall within the institution displays the names of 13,000 Jews who took refuge in the city during World War II.

A golden temple atop a sacred mountain, known for its giant effigy of the revered Pu Xian.