Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Eighty million natural history specimens call this gargantuan museum home.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

One of the largest trees of its kind in California.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

Secret Swing.

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

Willy Wonka would love this weird half-a-home.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

This whimsical fountain pays tribute to Toronto's four-legged friends.

Smallest house in Toronto sits on a lot meant to be just wide enough for cars to drive through.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

A reminder to choose water over wine since 1888.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

Slyly buy a shake in the Parker Meridien lobby.

A sculptural commentary on capitalism pokes up from the East River.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

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

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.