Hundreds of antique bank vault locks on display in New York City.

A legendary speakeasy bookstore returns from the brink.

Four miles of pipelines form the model of still-functioning retro-tech efficiency.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Unrepaired walls from a 1920 anarchist bomb attack.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

A priceless collection of the Nation's cryptologic history.

Electronic inventions that resulted in products and systems we use every day are on display in this labor-of-love museum.

A museum dedicated to exhibiting remarkable outsider art.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

This unique Renaissance castle was turned into a home for Nazi occultism.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

A rare view of a preserved Victorian science museum.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

A winding, cliffside stretch of road overlooking the Delaware River.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

The library of every book lover's dreams.

An abandoned stretch of highway, deteriorating next to the operational one.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

This dramatic rail curve was once the target of a failed Nazi attack.