A magnificent waterfall nestled in the heart of the El Yunque National Forest.

The world's brightest bioluminescent bay.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

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

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

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

A tribute to Ponce de Leon's supposed quest for eternal youth.

"We Seceded Where Others Failed."

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

The highway's southernmost spot is a beloved local attraction.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The second oldest continuously operating bar in Louisiana.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

The world-record holder for the longest bridge stretching continuously over water.

This 13-foot smiling peanut in Georgia helped Jimmy Carter win the 1976 presidential election.

A home that witnessed Civil War combat on the Sunken Road has the battle scars to prove it.

An overlooked memorial honoring the local Washington residents who died in World War I.

The tennis legend used this racket while breaking the race barrier and becoming the first Black man to win the US Open.