This cheese shop also houses a museum devoted to Dutch dairy.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Cat art as far as the eye can see.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

One of the first intercontinental ballistic missile sites in the United States.

An impressive collection of farm equipment and other artifacts from life on the prairie.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

Calidum et Deliciose Succosum!

This sculpture gallery is home to magnificent beasts made of scrap metal and found objects.

An entire city block built completely out of petrified wood.

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

This 19th century Sioux City candy company is the home of the Twin Bing, a historic, chocolate-covered treat.

Largest gathering of hobos in the country has been meeting annually since 1900.

This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

Home with Gothic windows featured in a famous painting.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

Astonishing collection of helmets, scientific instruments, and medical models.

The oldest continuously inhabited street in America.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

A hidden bar inside an ad agency has a deliberately misleading name, so employees can stay late under pretext of paperwork.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.