100 years later, they're still down there.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

This family of wooden moose statues have become local celebrities in their hometown.

Considered by many to be a local landmark and treasure.

One of the oldest surviving lock houses on the Ohio River.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

The oldest farmer's market in America is so ancient it was approved by the King of England.

The first American department store, and home to the largest operating musical instrument in the world.

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

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

This Virginia town has been famous for its fried chicken since the 19th century.

Exact replica of the ancient monument, but much, much lighter.