One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

A mysterious spirit totem at the edge of Navajo lands.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

Tucked away between two 19th-century buildings, this small shop specializes in the macabre.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

A local scoured more than 1,000 acres for stone to create his masterpiece.

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

One of the American Southwest's most extensive collections of Navajo rock art.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

Two massive rock outcroppings on the Oregon coastline.

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

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

This old mining town, deep in the California desert, has a year-round population of one.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Water of undetermined depth has attracted rare fish and cult leaders alike.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.