The train collection of an eccentric New England seafood mogul is now a National Historical Site.

An abandoned incline railway site is now a green space with six acres of trails connecting hilltop neighborhoods.

Contrary to popular belief, this secluded statue doesn't represent Pennsylvania's founder.

The first of Lancaster's "rural cemeteries."

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

An Irish Memorial commemorating those who perished due to potato blight.

Alexander Hamilton’s creation caused quite a bit of controversy.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This elaborate towering structure was once famed for its revolutionary height.

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

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

The world’s first penitentiary, meant to be humane, drove men insane.

A serene but haunting memorial to protective wetland lost, the absence of which directly damaged the Lower 9th Ward following Hurricane Katrina.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

The world-record holder for the longest bridge stretching continuously over water.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.