Once the smallest park in the national system.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

This quirky curiosity shop takes its cues from the world's bazaars.

"X" marks the spot of an echo chamber in the middle of a plaza.

A statue honoring 44 continuous years of greeting passing ships.

This kitschy tavern is also home to rare early editions of "Treasure Island."

A modest walled graveyard where nobody is actually buried.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

Georgia's first brewery is also one of its oldest surviving buildings.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

This beloved marketplace mascot poops money and grants good luck.

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

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

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

Century-old shop, specializing in Occult products.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

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

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

One of the oldest of its kind.