This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The only freestanding table rock formation east of the Mississippi.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

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

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

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

A layered tribute to the work of mosaicist Isaiah Zagar.

This sculpture of a fisherman spent six years at the bottom of the Schuylkill River.

Originally a cemetery, this city park remains speckled with a handful of scattered gravestones.

One Pittsburgh musician's decades-in-the-making memorabilia collection is on display at this rock-n-roll curio shop.

Dozens upon dozens of boulders engraved with scripture tell the story of one man's troubled life.

This colonial mansion has been home to a staggering number of American historic figures.

A diorama of the Civil War, fought by cats.

The final resting place of the Hollywood star who came to a tragic end.

This giant disembodied horse head seems to balance impossibly on its nose.