The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

Bison, America's national mammal, are staging a slow comeback in Ohio's prairie parkland.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

An abandoned relic of the city's failed experiment with below ground transit.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

A castle built by an eccentric medieval enthusiast in rural Ohio.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

The history of whiskey and all of its boozy glory, from Colonial days to modern American cocktail culture.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

A man's home is his castle.

All that remains of a gigantic earth-moving machine.

The highest point in Maryland is only accessible by hiking through another state.

Herbert Hoover's "Brown House" rural presidential retreat was a PR disaster amid the start of the Great Depression.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Rare recess caves fill this unbelievably beautiful Ohio park.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

Visit this playground of waterfalls, caves and sinkholes.

The largest earthwork effigy in the world.

This historic Ohio bridge is adorned with fanciful locks left behind by loving couples.

This abandoned train tunnel has been the subject of countless ghost stories for years.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.