Elevated freight railway turned wildly successful urban park.

This hollow steel globe is the second-largest in the world.

This fallen red oak tree has been transformed into a piece of trailside art.

One of the few surviving original NASCAR dirt-track speedways.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

A six-foot pair of socks hangs from a drawer of the world's largest bureau.

A psychological self-portrait in the form of a giant, segmented head.

This scented city oasis was a labor of love.

This research center for rare prosimians is studying how they sleep to help prolong human life.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

A retired tobacco farmer's pet project turned into a sturdy miniature city.

This woodland architectural installation acts as a camera obscura for the heavens.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

An autonomous oak in Alabama.

The only Florida state park with publicly accessible caves.

A cheeky alleyway window hosts tiny rotating exhibits with outsized charm.

A brick-lined alley full of public artwork tucked away in downtown Gulfport.

The second oldest continuously operating bar in Louisiana.

A snapshot of the city's fascinating voodoo culture.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

An experimental, automotive replica of Stonehenge.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Every president in history is immortalized in bronze in downtown Rapid City.