In Tucson a giant metal snake helps pedestrians cross a busy highway.

A cabinet of curious mathematical models and old calculators.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

Ancient pueblos built into the base of a natural canyon wall.

A spiritual vortex among the red rocks in Sedona.

A reproduction of earth's many biomes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

A historic freight system that found the true gold rush is in tourism.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

A trading post in the North Pole where children send letters.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

Industrial ruin decimated this tiny New England company town in a fashion no one saw coming… and even fewer remember today.

A New England curiosity cabinet, one hundred years on.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

One car at a time please.

A small chapel celebrating the spiritual bond between dogs and humans.

The "original web site," this farm in Northern Vermont encourages orb-weaver spiders to build their daily webs, and then sells the preserved masterpieces.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

This modern medieval weapon of war was built to toss pumpkins.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

Even Henry David Thoreau found this glacial pothole irresistible.