This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

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

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

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

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

A spiritual vortex among the red rocks in Sedona.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

The only road through the heart of Glacier National Park.

This erect, phallic geological spire wasn't always named so domestically.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

An experimental, automotive replica of Stonehenge.

A diverse, expansive nature preserve in northeastern Kansas.

A hotel and restaurant serving as the mecca of kitsch.

France's most famous cemetery, with some of its most curious tombs.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This bridge was constructed from the rubble of the infamous Bastille.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

The narrowest street in Paris.

The original resting place of Queen Cleopatra and Mark Antony's only daughter.