These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This whimsical outsider art wall holds tiny treasures donated by the local community.

The only ancient owl carving found east of the Mississippi.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

A tourist attraction founded around a slumping cabin.

Two massive rock outcroppings on the Oregon coastline.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

This site commemorates the former inn and restaurant where the chocolate chip cookie was first crafted.

Radical Bookstore and Community Space.

Rare recess caves fill this unbelievably beautiful Ohio park.

These layered sandstone mountains in China look like they are made of pressed crayons.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

The site of the one of the most deadly train wrecks in American history.

The small cave that housed Tennessee's "first citizen."

This replica of the Greek structure is in the heart of Nashville.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.