Unannounced visitors are now welcome at the site of the largest Prohibition-era bootlegging operation in the region.

There aren't too many operational funiculars around, but Pittsburgh has two!

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

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

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

A sparse, solitary sequoia still stands as a living tribute to the famous conservationist who planted it—but it's dying.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

This Japanese treats shop may have been the first business to mass-produce fortune cookies in the United States.

Furniture tries to escape an abandoned building in San Francisco.

A modern frieze of ancient Grecian mythological figures playing a national pastime.

A quiet marker in memory of local men and women lost in WWI.

Deco Modern sculptures of the people of the Pacific, cast for the 1939 Golden Gate International Exposition.

A classic advertising icon immortalized in regal bronze.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

This contorting sculpture is the tallest in San Francisco.

Masterful ceramic fountain and map of the Pacific Basin.

A modest reminder of treacherous waters at the Golden Gate.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

A monumental cross hides in the trees in Golden Gate Park.

A shining, cold, black organ lies in San Francisco's financial district.