This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

This is one really big nut.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A decorated war pigeon stands guard in eternal taxidermied rest at his alma mater.

Creaky dinosaurs grow in the backroads of Monmouth County, New Jersey.

Home of the golf club used by Alan Shepard on the moon, and more artifacts from the sport's history.

A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A world-class collection of mechanical musical instruments and automata.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

The site of one of history's most indelible and horrific tragedies.

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

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Expertly restored pinball machines as far as the eye can see.

The only one of New Hampshire's original 14 World War II watchtowers to survive in near-original condition.