This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

An industrial waste tourist attraction.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

This collection of over 50 classic pinball machines awaits visitors to downtown Roanoke.

America's first serial killer rests in anonymity.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

The highest point in Virginia can only be reached by passing through ponies and flowers.

The birthplace of Appalachia's only first lady, who some have dubbed the United States' "first female president."

This tower was once used to create ammunition for early settlers.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

A heartwarming message to those entering and departing Music City from above.

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

This homegrown adoption center offers a wonderland of feline companionship.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Home to drunken tower-climbing goats... seriously.

The site of the Scopes Trial contains a small exhibit dedicated to the famous case.

Visit this playground of waterfalls, caves and sinkholes.

This nine-story building can be played like an instrument.

This replica of the Greek structure is in the heart of Nashville.

Buttermilk biscuits so nice, you'll say “yay” twice.

It may take some time to locate, but it's sure to warm even a heart of stone.