Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Tubing through a cave lit with glowworms is a magical underground experience.

A mysterious dark-skinned Christ statue has been this town's religious center for centuries.

Marta Becket's hand-painted theater in the desert.

This giant temperature attraction created some giant electric bills.

World's second largest particle accelerator, where nature reveals its secrets.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

Internationally known record store and purveyor of "dusties."

A bizarre roadside attraction and the first instance of miniature golf in the world.

Walk the whole Mississippi River!

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

The home of aviation trailblazers, in a remote corner of the big city.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The oldest continuously inhabited street in America.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

At 207 feet, one of the world's longest continuous escalators.

The site of the climactic scene from the classic horror film is now a historic landmark.

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

Final resting place of two dozen New York City harbor ships.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

A layered tribute to the work of mosaicist Isaiah Zagar.

An Irish Memorial commemorating those who perished due to potato blight.