This set of rickety spaceships are prepared to give alien travelers a place to relax and go to the bathroom.

A virtually untouched "home on the hill" for the flora and fauna of Rhode Island.

This rock in the middle of a river in Jayuya contains dozens of Pre-Columbian Taíno petroglyphs.

This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

The ruins of the first Spanish settlement in Puerto Rico.

The short hike is worth the stunning views and crystal blue waters of a secluded beach.

The world's brightest bioluminescent bay.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The largest land animal skull ever discovered.

Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

The pits used to load the nuclear bombs onto the aircraft that dropped them over Hiroshima and Nagasaki at the end of World War II.

In ancient times, these fallen standing stones supported a massive house.

This stone, said to have once been a young woman, is sacred to the Dakota and Lakota nations.

Three legendary, living albino buffalo roaming their pastures for all to see.

These strange large stones served as a campsite and lookout post for generations of Native Americans.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A semi-scholarly approach to sex.