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

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

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Exact replica of the ancient monument, but much, much lighter.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A "hospital" where people went to be quarantined, die, and be buried in the yard.

The oddly shaped, steam-spewing building is now an art studio and gallery.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

Yo, Adrian!

World War II bunker still standing on the New Jersey beach.

Step inside Lucy, the world's largest "elephant."

A piece of outsider public art accompanied by a strange urban legend.

A maritime museum holding the remains of Blackbeard's pirate ship.

Burial site more than 300 years old.

A mailbox that saved a nature reserve.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

A statue honoring 44 continuous years of greeting passing ships.