Go surfing on this urban wave, "hacked" by local surfers.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Op-art architecture designed for happiness.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A sharp bend in a dramatic river canyon cut through red rocks.

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

Collection of vintage trailers double as hotel rooms.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A spiritual vortex among the red rocks in Sedona.

An urban laboratory.

A geological mystery on Camelback Mountain.

A self-built castle made by a mysterious man.

Ancient human, animal, and geometric figures drawn in the earth.