When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

America's post-nuclear-attack chambers of Congress.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

An enormous natural sandstone bridge in Kentucky.

The world's longest known cave system.

All that remains of a gigantic earth-moving machine.

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

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

The largest ancient burial mound in Ohio.

What is it about mushrooms that makes people wish they lived inside of them?

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

Deep scars on the earth left by the Ice Age.

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

Take a drunken tour inside the world's largest known geode.

The largest earthwork effigy in the world.