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

This mosaic commemorates the oldest subway tunnel and station in the United States.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

A gift to the children of Boston, this bronze bear represents playfulness, a spirit of love, and the warmth of big hugs.

What may be Boston's finest Art Deco building, located in the city's Financial District.

This gorgeous space is England's largest independent library outside of London.

This sculpture made up of 22 bulbous bronze figures reminds locals of massive Weeble Woobles.

A stone copper was sculpted on the wall of the Carlisle Cathedral to honor a local hero.

A reminder of a long-gone community and way of life on the River Tyne.

This sculpture commemorates a naturalist and an illustrator whose work was a forerunner to modern field guides.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

Harry Houdini plunged into the Charles River and performed one of his escape acts here in 1908.

Created by a local artist, these quirky sculptures each have their own names and personalities.

The world's largest piece of copyrighted artwork.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

This statue intended for children to enjoy became a minor political spat.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

This impressive Boston holy house is the American mecca for Christian scientists.

Dedicated to one of the darkest moments in Irish history.

Tragedy on Little Brewster Island memorialized.

One of the indelible moments of the American Revolution took place at this location.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.