A unique collection of more than 250 rocks and minerals located on a university campus.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.

This bare tree might not have leaves but it is constantly clothed in festive decorations left by mysterious local benefactors.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

This Birdsill Holly fire hydrant is the remnant of a very different type of hydration innovation.

An eerie and beautiful group of columns mark the site of a grand mansion lost to time and fire.

This is not your typical jungle gym.

This small Arkansas town once had a close encounter with the Beatles, and are determined never to let anyone forget that. Ever.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

Town not known for anything except its strange name.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Home to items never before seen by the public.

Glacial erratic or man-made dolmen? It probably wasn't druids.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

One of the most unusual geological features, recognizable from a dozen hit movies.

Everyone and everything one man ever loved and lost, now stare into the East for all eternity.

This hidden jockey “walk of fame” celebrates the winning riders of the Kentucky Derby.

Hidden in magnificent rolling countryside, see what may be the largest modern stone circle in the world at Wisconsin's very own "Stonehenge”

Over 12,500 words are scrawled across each room of this historic plantation house and no one knows why.

When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.