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

Yo, Adrian!

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

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

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.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

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

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A monument to the art of slicing people open.

The gigantic preserved heart of a champion racehorse.

Dedicated to an "Unknown Man," this grave holds either the remains of a lovelorn suicide or a Cold War spy.

One of Australia's largest secondhand bookstores.

This Western Australian mint was established during the height of the Australian gold rush.

Every hour a secret compartment drops from this giant pocket watch, revealing a lovely surprise.

Taxidermy of the racing horse with a huge heart, who inspired hope in the Depression.

The bullet-banged DIY suit of armour belonging to Australia’s most famous outlaw.