Where beautiful signs live on forever.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

This abandoned amusement park was built on a site with a dark history.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Oldest unrestored plantation house in America that is open to the public.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

The remnants of an early American attempt at missile defense.

This woodland architectural installation acts as a camera obscura for the heavens.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

A brick-paved former section of the historic coast-to-coast highway.

Less a museum than a bizarre fantasy world created by artists and engineers.

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

This lab's maddening silence is good for business but bad for sanity.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

These elevated trucks were put in place as a middle finger to The Man, but are now considered folk art.

This zombie-themed restaurant stands out in the heart of corn country.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

Every last book in this bookstore is signed by the author.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.