I think one of the earliest is the famous "moat hole" at Galen Hall CC, near Reading, PA. Number 15 has a green that’s surrounded by a ten-foot wide moat. From the back tees, it’s a daunting 193 yards. From the middle tees, it’s a more manageable 148 yards. The course has a good pedigree. The first nine, which opened in 1911, was laid out by Alex Findlay. The second nine, which opened in 1917, was done by A. W. Tillinghast. Gordon did work in the 1950s lengthining the course from a par 68 to par a par 72 but the 15th remains. The course is home for the Albright College golf team. It's a fun course to play.