The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

In the 19th century, this canal provided power to mills, machine shops, and other businesses in the area.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

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

A "Bugseum" dedicated to all things insect-related resides behind a pest control company.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Penn State's giant bug collection.

Steepest flood safety railway in the entire world.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This little museum in the town where zombies were born celebrates the living dead.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

A rare view of a preserved Victorian science museum.

These unique rock formations were created during the Ice Age.

An industrial waste tourist attraction.

A beloved horticultural oasis on the grounds of a wealthy family's former estate.

The largest collection of Frazetta originals in the world.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

This roadside stand packs 300-plus varieties of tomatoes, from "Maiden's Fire" to "Kaleidoscopic Jewel."