Dr Barnes' $25 billion private collection of art and arboretum.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This church houses the “incorrupt” body of its founding Bishop.

These early tent-shaped grave coverings are unique to Appalachia.

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

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

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

Jule Körner's house full of bizarre architectural details.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

A monument marks the location of the first successful steamboat demonstration.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.