The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

"A hideous albatross in the Hudson River Valley."

The actor best known for slapstick comedy is memorialized in his home town.

This lookout tower built in the 1930s is now an in-demand cabin with what might be the best view of the Seneca State Forest.

A beautiful Gilded Age hotel in the White Mountains with surprising diplomatic history.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

An iconic Soviet statue of working-class people.

With over 10,000 lights, this engineering marvel lights up the city after dark.

Take a step into the workshop where Edison and his employees revolutionized the world.

An abandoned town is hidden in Great Smoky Mountains National Park.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

One of the most poignant ruins of the Chornobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chornobyl disaster.

One of England's most famous churches hides a pair of little known architectural treasures.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Famously misunderstood wonder of the ancient world

This basilica is dedicated to two saints, one of which is known more for his famous quote.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

Louise Bourgeois' 30-foot-tall steel spider sculpture.