These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

These massive concrete balls were used to mine gold in Virginia.

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

A secret, rocky playground hidden amongst the plain white beaches of the Florida coast.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

The world's largest private aircraft collection.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

Abandoned silver mine strewn with wrecked and twisted structures.

Unlike most arches, this geological oddity formed in a volcanic dike.

This massive marble memorial was built bit by bit either out of devotion or spite, but at the expense of the surrounding town.

Beer lover's can-covered house.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

This historic general store still operates much as it did in the late 1800s.

These ruins are all that's left of the former Alabama State Capitol.

A rusted metal giant pays tribute to Birmingham’s industrial past.

A blacklight journey through a celestial art exhibit.

On a dusty county road sit the ruins of a ghost town's abandoned church.

The highest point in Texas is capped by a big silver pyramid.

Beauty and history abound in this remote West Texas canyon.

An Idaho legend carved out a cave village with his own two hands.

The shortest river in America flows for just 201 feet.

"Polynesia on the Plains."