An Irish Memorial commemorating those who perished due to potato blight.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

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

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A layered tribute to the work of mosaicist Isaiah Zagar.

Washington's iconic carousel has a nice piece of Civil Rights history.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A line of blue paint marks the route of the inaugural parade.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

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

Yo, Adrian!

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.