Patrick Dougherty's fantastic living tree sculptures, mind-blowing but temporary.

This one-room schoolhouse in rural Arkansas dates to the 1920s, but looks like it could be the 1820s.

Peak named for an old man who liked to run in the nude.

Famous for its bio-luminescent inhabitants, known as "Dismalites" .

The small cave that housed Tennessee's "first citizen."

This popular park is home to a sea serpent sculpture that now overshadows the twisted history of its creation.

This quirky local sculpture is quite literally a fish out of water.

This replica of the Greek structure is in the heart of Nashville.

Giant novelty guitars now mark the spot where Robert Johnson is said to have sold his soul to the devil.

An abandoned early-20th-century boomtown sits within the Calico Rock city limits.

This defunct, fortress-like prison has been the setting for several movies.

Dinosaurs invade a suburban Nashville neighborhood.

The longest non-mortared wall in the country is one man's tribute to his displaced Yuchi ancestor's five-year journey to her homeland.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

The first full-scale tunnel built in America is short but scenic.

A museum dedicated to man's boldest venture.

In the hometown of the Grand Ole Opry star is a larger-than-life memorial statue made entirely from chicken wire.

This "little gallery in the middle of nowhere" is housed in a 170-year-old horse barn in the Missouri Ozarks.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

Thousands of unique minerals, including some of the most impressive fluorite crystals in the world.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.