Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Wedged between two sets of row houses is an awkwardly located family graveyard.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

New York City's smallest piece of private property.

The first piece of public art dedicated to LGBT rights.

Once America's tallest structure, now a Baltimore landmark.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

A layered tribute to the work of mosaicist Isaiah Zagar.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

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

Yo, Adrian!

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

A daily replay of the experiment that proved the rotation of the Earth.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.