Whitewashed mosque contains the world's largest carpet.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

This Arkansas town is known for its gangster history, its healing waters, and now its brews.

A bizarre house filled with an astounding array of collections.

Home to items never before seen by the public.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

As one of the world's largest hydroelectric dams this plant took two countries to get built.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A 16th-century Andalusian palace.

Go inside to really appreciate this 500-year-old technological masterpiece.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Vines grow up the metal bars in this public park created from an old machine factory.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

At this museum in Iceland, visitors can sample fermented Greenland shark.

Iceland's tribute to its thankless civil servants.