The Road To Nowhere
By 
Due to my choice of profession, I tend to spend a lot of time using computers. Consequently, I work with a lot of applications - that means I see lots of different user interfaces. Some are good, some are bad - but every now and then, I find something in between. Sometimes, it perfectly showcases the developer's sense of humor.
For example, here's what the "Go To" dialog looks like in Notepad++. You can access it by pressing CTRL+G.
Not sure that's the best design for the dialog - but I appreciated the humor. :)