This bridge was the birthplace of a unit of measurement based on a fraternity joke.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

Statue commemorating the use of ether in anesthesia.

The Boston square dedicated to the dark poet who was born nearby.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This former boomtown "island" is now submerged below Folsom Lake.

Mexico's astounding mummy museum with "the world's smallest mummy."

A modern mechanical planetary system, part of a 10,000 year clock.

Half of a house.

A mysterious painting of the self-declared Emperor of the United States watches over a local hof-brau.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

An artsy hidden staircase leads to breathtaking views of San Francisco.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

This giant head is all that remains of a once proud statue that survived an earthquake but not a fall off of a wagon.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

A museum, art project, and institution that demands we look at the world around us in a strange new way.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Once a purveyor of Santeria supplies, religious products , and household sundries, now closed.

The legendary building that needed ghostly approval before being built.