Quite possibly the last cross all humans will ever see.

Genesis of modern hydroelectric power.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

This massive airship factory is so large that it has its own indoor weather.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

America's "second most important bell" is a contentious spoil of the Civil War.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

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

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

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

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

An underground magnet for ever-changing street art.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

The record holder for the world’s largest peach.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.