Regular contributor "caknuck" submitted the The Citadel in Halifax, Nova Scotia. This fort was built in the mid-19th Century to protect the British harbour city of Halifax from an American invasion. While it never faced a direct attack, the fort…

Ground Zero, site of the 9/11 tragedy.

The Lincoln Memorial is in Washington DC, just west of the Washington Monument (posted earlier). The Lincoln Memorial was built to resemble a Greek temple. It has 36 Doric columns, one for each state at the time of Lincoln’s death.…

A rather sombre one here. The Arlington National Cemetery is where thousands of American service men and women are buried. Those little ridges along the grass aren't ridges. They are all graves. Thanks R.B. Boyer, djojo, Keith, Spaz & Stranger.

The Boeing factory building is the biggest building (by volume) in the world. The original building was constructed in 1966 and completed in 1969. Its footprint now covers 98.3 acres and is where Boeing constructs their 747, 767, and 777…

Big Surf water park is in the Phoenix metro area of Arizona and as you can see there's a giant old school Pepsi logo in the pool. Thanks: Rich Kaszeta