Best birdwatching -- east - 2000
Denver International Airport
All right, maybe Denver International Airport isn't exactly a nature preserve, but try and tell that to the birds (not the giant steely ones). The airport has had to catch and release intrusive sparrows from Concourse C, halt construction for migrating burrowing owls on several occasions and alter flight paths to protect the sensitive ears of bald eagles at several nearby nesting areas such as Barr Lake -- a real birdwatching mecca. Compared to its other problems, though, these glitches aren't that fowl.