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

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

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

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

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

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

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

A rare view of a preserved Victorian science museum.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

Extraordinary objects lurk in this quintessential regional museum.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

A huge cathedral single-handedly constructed by one eccentric monk.

A vertically floating hemlock controls the waves and weather at Crater Lake.

This massive underground salt mine now holds a sci-fi theme park in its depths.

A harrowing trail up a mile-high mountain.

Rare and strange weather predictors, from mercury barometers to leech prognosticators.

The curious and tiny collection contains some very odd objects.