Where: 636 Chain Bridge Rd., McLean
Listing Price: $13,500,000
Time on the Market: nine days
This Potomac riverfront estate, built in 1968, was designed by architect John Carl Warnecke for Senator Ted Kennedy. On six-and-a-half acres, the home has more than 10,000 square feet of living space. The living room, banquet-sized dining room, and library have large glass doors with views of the river. There is also a recreation room, an exercise room, a two-car garage, a gated circular drive, a courtyard with a fountain, a heated pool, and a tennis court.