Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Each winter this underground cave forms a dazzling ice palace.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Browse through roughly 130,000 titles in the world's largest independent video rental store.

This Seattle store is packed with all sorts of curious creatures and creations.

A busy cafe better known for board games than food.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

Like stepping into a spooky fairy-tale, this shop carries the dark ideas of artists and other makers.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Historic Hull Street was actually the first street with a proper name in the Boston area.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

A men’s restroom became a sandwich shop.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

This landmark cemetery in Boston was created more than 300 years ago.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The headquarters in Salem doubles as an occult art gallery.

A collection of full-size movie monsters opened to the public.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

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

The only structure left with direct ties to the Salem witchcraft trials of 1692.