Astronomical observatory above Lake Titicaca.

Bolivia's needle-like rock formations.

A valley of unique erosion patterns lends to a view like nothing on Earth.

A seemingly endless landscape of pure salt stretches far across Bolivia.

The ominously named cave is home to some remarkable ancient art.

This was once the center of the Birdman cult, and is now a World Heritage Site.

The largest stone moai on Rapa Nui.

The world's fifth tallest waterfall is a spectacular silver chute of water that cuts through the cloud forest in northern Peru.

These giant mummies are set ominously into a Peruvian cliffside and topped with real human skulls.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

A pair of black granite tails dive into a sea of grass in landlocked Vermont.

This statue honoring the most decorated dog of World War I stands in a Connecticut park.

A museum dedicated to a sea that should have never been.

It would be a crime to miss it.

This San Diego museum is dedicated to preserving women’s historic achievements.

A museum dedicated to the decorative arts from the 16th through 19th centuries.

The ruins of the movie ranch owned by actor and stuntman Ray "Crash" Corrigan.

These tall, red sandstone pinnacles outside Moab are often forgotten amid their more famous neighbors.

This park celebrates a sister city relationship that survived the Cold War.

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

The site of the gruesome massacre—and maybe cannibalism—of five men, a tragedy that made Alferd Packer infamous.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

Atop this arch, during the 16th-century, a sermon was given to those suffering from plague.

The church and nearby castle are all that remains of a medieval village, mysteriously abandoned.