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

Moonbows over Kentucky.

The world's longest known cave system.

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

This bridge was constructed from the rubble of the infamous Bastille.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

Monument to the cotton-destroying boll weevil.

Auburn's iconic eagle flight goes back to a 19th century eagle that dropped dead on the field after inspiring the football team to victory.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Official museum, hall of fame, and repository of the Texas Rangers.

Golden Gate Park's historic collection of plants.

The celebrated eyesore created by starry-eyed sweethearts.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Rabbit Hash is a heaping slice of Americana from another era, with a very peculiar origin behind its unusual name.

A castle built by an eccentric medieval enthusiast in rural Ohio.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.