A fairytale art house in the middle of Wisconsin.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

More than 5,000 contemporary and "historic" mustards from around the world.

The center of the only hemisphere that awards visitors with a commemorative coin.

This pebble beach is so beautiful that taking its rocks is against the law.

A complex of six forts embedded in the Rajasthan hills.

An extraordinary "City of Caves" carved from solid stone.

Rock-cut cave complex filled with ancient Buddhist artwork.

The world's second-largest sundial, made entirely out of stone.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

The remains of what was, not so long ago, the world's largest city.

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

A mecca for India's Jains.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

Centuries-old bridges grown from tangled roots.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

A Milwaukee museum provides an unsparing and ultimately empowering look at the Black American experience.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

A unique botanical garden housed in three giant geodesic domes.

This art gallery and oddities boutique bewitches visitors with a trove of occult trinkets and eccentric antiques, work by an ever-changing roster of underground artists, and classes in tarot and other mystic arts.