A restored Pittsburgh house of God has been converted to a marvelous house of suds.

An abandoned railroad tunnel transformed into a creepy path for hikers and cyclists.

A single light illuminates one man's overshadowed contributions to street lamp history.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

After this former brothel closed, its interior remained almost frozen in time.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

This museum glorifies the humble potato.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

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

These etchings reveal the history of a long-gone quarantine site.

This stunning Connecticut mansion is actually just a one-room-deep hoax.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

The stickered marker pinpoints where the only maintained road in the United States crosses into the polar region.

A classic gold rush hotel can be expected to pick up some ghosts along the way, and the Golden North is no exception.

A rare kind of blue bear can be found chiefly in the national park that shares their name.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

The ruins of this Alaska gold mine form a gorgeous ghost town.

This whimsical stacked cabin looks like something out of a children's book.

Inside this small brick bungalow is a collection of toys intended for the afterlife.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

Before online banking and smartphone apps, there was "commuter banking" in the subway in Downtown Brooklyn.