The world's first aircraft factory has been hiding inside an automobile plant for almost 80 years.

Explore the evolution of printing technology, from cuneiform to Kindle.

A room hidden behind a swinging shelf in the children's section.

The Fox Sisters, America's leading mediums in the mid-19th century, possessed a table they claimed helped them "communicate" with the dead.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

This landmark jazz venue is the oldest continuously running African-American club in the United States.

The seat of Buffalo government is a gorgeous Art Deco palace.

Buffalo's abandoned concrete grain elevators are getting a second life.

The floor-to-ceiling collection in an old factory is a unique alternative to stuffy galleries.

Quite possibly the last cross all humans will ever see.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

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

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

This restaurant preserves and serves lesser-known and regional Nepali food.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

Healing Springs that once ran red with soldiers' blood.

A volcanic fissure over two miles long and up to 70 feet deep.

This large maar crater in Oregon is the bigger brother to Hole in the Ground.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

This perfectly preserved Chinese medicine shop was untouched for decades before being reopened as a museum.

Make it an offering.

All aboard the world's longest miniature railway.

A curious building honoring past and current members of a historic musical comedy troupe.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.