Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

A modernist landscape of water and sci-fi concrete.

This shop filled with oddities and knick-knacks is named for a 19th-century charlatan.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Journey inside the bowels of this sperm whale sculpture.

Public outcry led to this bridge's unique character which celebrates a giant frog battle and also sewing.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

Step inside Lucy, the world's largest "elephant."

Whimsical artist house in the New Jersey woods.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

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

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

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

This dramatic rail curve was once the target of a failed Nazi attack.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

The last street in Pittsburgh that's paved with wood.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

A local prank turned town icon.

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

A failed piece of Orientalism has become the proud symbol of a community.