This incredibly diverse research station is one of the largest tropical botanical gardens in the world.

A state park that once served as an important river crossing, and now offers protected lands for endangered plants and animals.

Remains of a historic fountain that was mysteriously lost in the demolition of a D.C. traffic circle.

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

A full-size replica of this well-preserved temple lets you take a walk through the Mayan age.

This neoclassic cathedral also houses what is believed to be the oldest clock in the Americas.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Could it have picked a better place to land?

These colorful sawdust illustrations are trampled into non-existence only moments after they are finished.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

Archaeological sites and great food inside the island's largest mangrove forest.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

Everyone from Alan Ginsberg to The Rolling Stones has stopped by this classic dive bar.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This tiny home was originally a narrow alleyway.

At this studio, musicians, engineers, and quite possibly a music-loving ghost carry on Puerto Rico's musical traditions.

The ruins of the first Spanish settlement in Puerto Rico.

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

The crumbling remnants of this 19th-century quarantine hospital hint at the touristy island's darker past.

This small fort played a huge role defending Puerto Rico’s capital city.

Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."

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