Neatorama reader Jerrold Litwinenko wrote about a weird hobby: airplane spotting [wiki].
"Plane spotting" is an odd hobby, and most certainly isn't for everyone. But those that do it are really into it and seem to enjoy themselves immensely. I learned this first hand the other day when on a whim I decided to take a curiosity-induced drive around the perimeter of Toronto's Pearson International Airport and see what I could learn about the phenomenon that is plane spotting.
Of course, some of the best plane spotting pics can be found at Airliners.net. For example, this, this, and this
Where is that crazy airport? from The Princes Juliana International Airport [wiki] on the island of St. Maarten.