This old cement mine has been used as everything from a mushroom farm to a recording studio.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

The oldest continuously inhabited street in America.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

San Francisco's newly reopened hands-on science museum.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Two thousand artifacts from around the world collected by one woman who loved to travel.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A walk through the historic city center, under the streets of Seattle.

A layered tribute to the work of mosaicist Isaiah Zagar.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An enormous, inside-out glass globe built in 1935.

The largest Buddha statue in the Western Hemisphere is just 50 miles north of NYC.

Abandoned power station once home to a squatter community, now being developed into an arts center.

Sniff the Titan Arum's rotting flesh.

A former seaside jewel built for the everyman is now simply a neglected art deco fortress.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

New York's southernmost subway station is whimsically wavy.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

"Mock all and sundry things, but leave the saints alone."

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.