This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

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

The remnants of an archaeological camp stand within Tikal National Park.

These roaring primates were considered a divine creature in the cosmology of the Maya.

Monkeys inhabit the lush forest surrounding ancient Mayan ruins once considered sacred.

An important Mayan religious and trading center dating back to 200 BC.

A massive underwater sinkhole made famous by Jacques Cousteau.

This fortress in Honduras was built to resist pirates, but its builders had more to fear from the British.

This massive Maya archaeological site is home to the tallest man-made structure in Belize.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

An eclectic assortment of medieval architecture in a small Iowa town.

Abandoned businesses, homes, and rusted cars are all that remains of this stopover town.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The oldest extant wooden jail in South Dakota and possibly the United States. 

This Nebraska museum was once the smallest courthouse in America.

Storage units with a wartime past.

America's largest man-made forest was planted in an effort to bring back the past.

This was the first homestead registered after President Abraham Lincoln signed the Homestead Act into law.

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.