Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

Century-old shop, specializing in Occult products.

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

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

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

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

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

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

The only road through the heart of Glacier National Park.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

This giant steer-skull edifice refuses to die.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

The biggest solar telescope in the world helps reveal the secrets of our sun.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

An artificial crater field that trained astronauts for lunar exploration.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.