This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.

This museum preserves the heyday of Puerto Rican coffee.

This community-driven organization uses education and eco-friendly technology to protect the environment.

Built some 700 years ago, this Taíno ceremonial site features ball courts, petroglyphs, and evidence of ancient astronomy practices.

The world's second largest single-dish radio telescope, once used to contact E.T.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

A park where people have been going to feed friendly pigeons since the 18th century

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

The world's longest known cave system.

See massive fossils that are over 200 million years old in northeastern Arizona.

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

This historic national park is covered in the stunning ruins of red rock pueblos.

A museum devoted entirely to the rattlesnakes and snake-related art.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

"I did this all while you were watching TV."

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

The first declared National Monument in the United States.

A popular rock that acted as a waymarker for American pioneers.

An experimental, automotive replica of Stonehenge.