OK, it's gotten the best of me... On 48th & Franklin just south of the power substation there is a HUGE house being built on the hill overlooking the enourmous pond, then "below" and to the west a little there is a small structure built into the hill. It has windows and is shingled like a house, but there is no obvious entry to the structure. What the heck is it?!?

I think you're talking about the 'hobbit' house built for a localtor doc's halflings.

Here's a little more info from an older thread:

http://www.okctalk.com/showthread.php?t=29696