This stately clubhouse has showcased German-American culture for over a century.

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

A park where you can watch the highway zoom past.

This Indianapolis landmark offers a secret panoramic view of the city. 

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

A medical facility that has been kept frozen in time.

This mysterious hill seems to pull objects uphill.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

This former zinc operation has a 90-year toxic history.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

A 21-foot-tall statue of a miner made of scrap metal stands in this West Virginia coal town.

A beautiful hidden gem in central West Virginia.

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

The penultimate and final resting places of British General Edward Braddock—minus a few bits and pieces.

Two gems of Beaux Arts architecture that have been sitting vacant for years.

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

The brainchild of Eleanor Roosevelt, her "Little Village" was a collectivist dream.

This university transit system is a 1970's vision of the future.

A well-preserved relic of the industrial age steel and iron works that dotted West Virginia.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Over 1.3 million confiscated wildlife products fill this macabre menagerie of illegal animal specimens.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

According to local legend, a tree grew from the stake that killed this alleged vampire. In reality, he probably died from influenza.