A world-class observatory in the California desert.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The headquarters of a secretive order is also a beautifully-designed park.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

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

The final resting place for the remains of 143 Habsburg royalty.

Commemorating the spot where the famous scientist fed his pigeons.

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

Watch the newest land on the planet form before your eyes.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The highest bridge in America was built for an almost unnervingly small amount of money.

The world's only complete colossal squid specimen is on display at the Te Papa Museum.

Yo, Adrian!

Ancient pueblos built into the base of a natural canyon wall.

An urban laboratory.

Frida Kahlo's childhood home, now a museum of her life and works.

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

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

Three columns of volcanic rock shoot out of the ocean.

Mysterious rocks that ring musically when struck.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.