A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

World's first "penitentiary," meant to be humane, drove men insane.

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.

This unassuming North Austin neighborhood was built to test the novel idea of home air conditioning.

Surrounded by low rise buildings and partially converted into an auto body shop, this marble archway is the only vestige of a forgotten Manhattan estate.

A stellar example of Art & Crafts architecture, and a movie set to boot.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

A retro walk through the history of the tube.

Artifacts fill the old headquarters of the hugely influential political movement to ban alcohol in the United States.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

This sculpture celebrates a boules tournament and the link between Leeds and its twin city Lille.

This mosque was based on Sub-Saharan Islamic architecture and created for the Senegalese Tirailleurs.

What do we know about the real woman behind one of the Beatles' most famous songs?

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Offering commanding views of the California coastline, this restaurant was a hub for the artists and bohemians of Big Sur.

Dance on a hand-hewn log floor padded with bouncy boxcar springs at a saloon built in 1883.

A giant knight, sex education, date shakes, and Jesus coexist happily in this Coachella Valley desert oasis.

A little barn in the middle of the city preserving Hollywood treasures since 1985.

An urban forest overtakes what was the greatest failure of utopic urban housing.