Southern Hills Country Club

Photo: Montana Pritchard/The PGA of America via Getty Images

Site of three U.S. Opens and a quartet of PGA Championships, this Depression-era Perry Maxwell design rolls out heat, humidity, wind and stern rough framing fairways and greens. Maxwell's oval and clamshell bunkers lack imaginative shaping, but they're perfectly placed. The 9th and 18th both climb steep hills to reach the greens, the latter being one of the game's toughest closing par-4s. Tougher still is the creek-guarded 12th, which Ben Hogan once called the greatest par-4 in the U.S.