You've got to check out Lance Armstrong's 448 acre ranch in Dripping Springs (outside Austin, TX) along the Pedernales River. Lance is currently selling the vacation home for whopping $12M (see the listing here).
The 5 bedroom/5 bath main house (there's also a small 1/1 guest house) is a relatively modest 4241 sf. The surrounding property has (naturally) 7 miles worth of bike trails and it's own swimming hole. I've hiked around Pedernales State Park during my time in Austin and it's a lovely area -- right in the heart of the hill country. If it turns out that Lance can't get his asking price (which wouldn't surprise me in this economy), I'd suggest he open it up as a B&B (a la Tori Spelling, but without the accompanying reality TV show). I know I'd happily spend a long weekend there, particularly this time of year. Besides, once he retires for real, he'll need something to do.
