A 30-acre garden inspired by the principles of modern physics.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Monasteries on rock pillars, once accessible only by frayed ropes.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A huge musical instrument played by the ocean.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

This fantastical icy castle is built anew every winter.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Death road of Bolivia.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

A 16th-century horror show built in a lovely Italian garden.

An alien landscape of chalk-rock in the Egyptian desert.

This tiny little island has, as the name says, just enough room for its single house.

The legendary building that needed ghostly approval before being built.

A swing to dangle you off the very edge.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

A dangling church built over a Colombian gorge.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Iron Age "bog person" preserved for over 2,300 years.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

These strikingly barren, rolling red hills were caused by bad farming practices.

Centuries-old bridges grown from tangled roots.