This is a pretty well know slipup. I decided to put the slipup in the quotes section since there isn't any where else to put it.

If you visit the Lincoln Memorial in Washington DC, on the right wall is the Second Innaugural Address. If you look closely, you'll notice the word "Future" is actually spelled "Euture". The person who carved the speech made the mistake. After the mistake was made, somebody tried to fix it but failed.

Here are some good links to pictures of the slipup:

http://texas4-h.tamu.edu/events/ldrconf/html0001/images/DSCN0064.jpg

http://www.sergeant-bluff.k12.ia.us/ms/holly4.html