The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

This historic furnace was once used to produce cannonballs during the Civil War.

A miniature golf course crafted inside the world's largest simulated cave.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Home of a 28-foot tall stalagmite known as the War Club.

One of the few surviving examples of the first lock and dam system built on the Ohio River.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

This abandoned school has had many lives since the early 1900s, and all of them doomed.

An abandoned 1920s school with a mysterious history.

An obelisk marks the farmhouse where the founder of Mormonism was born.

Designed as a place for patients to take in the scenery, this tower has a dark history.

This "common-as-dirt" museum celebrates the glory of normalcy.

This cavernous abandoned marble mine is popular with ice skaters in the winter.

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 lonely gas station has stood at this location since 1917.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

The notorious Wild West outlaw was raised in this unassuming abode.

The remains of this early 20th century refinery loom on a mountainside like a graffiti-covered fortress.

A ghost town that held steady longer than most, but finally gave up the ghost.

This ghost town was once a cult-like religious utopian settlement.

A sculpture for the sun and stars, created by Nancy Holt.

Come for the speed, leave in love with the desert.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."