Locals dubbed it the "Owl Building" because of its bird-like appearance.

Continuing the tradition of the dime museum in style.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A statue of the early navigator stands overlooking the land he first surveyed.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

Where a young athlete began his run across Canada after losing his right leg to cancer.

This rocky spread has been squeezed up directly from the bowels of the earth.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

Resonating tubes make music from highway overpass.

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

There are eight natural springs around town, each with a slightly different taste.

Artifacts fill the old headquarters of the hugely influential political movement to ban alcohol in the United States.

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

Could it have picked a better place to land?

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

An American flag was erected for every day that passed during the Iranian Hostage Crisis.

A rare particle accelerator with a tremendous energy range is tucked away at Ohio University.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

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

The only depiction of Abraham Lincoln holding a weapon, and the names of all 9,000 Cuyahoga veterans of the Civil War.