A mummy and sarcophagus are part of the many wonders in this library's collection.

The quarry was abandoned over 100 years ago, after a massive ammunition explosion ended in tragedy.

A rusted blade sticks out from the trunk of this tree, left as a memorial to a young man who left to fight in the Civil War but never returned home.

One patriotic farmer's ode to the 9/11 tragedy remains even after the farm changed hands.

This dilapidated ship carcass covered in trees is a striking sight.

The largest and most well-preserved petroglyph site in the Verde Valley.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A series of haunting wooden totems are hidden in the woods surrounding a German environmental center.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

The only surviving fragment of the lost Narragansett Pier Casino.

The longest living non-clonal organisms on Earth.

This ancient sword lay in a waterlogged tomb for 2,500 years, but managed to remain relatively untarnished and impressively sharp.

The final resting place of Harriet Tubman and other famous historical figures.

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

Bizarre Cavern.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

Local lore claims this park is named after a young woman who jumped off a cliff.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.