I agree with Pat. The 7th at Pine Valley is a hole worthy of replicating. The hole does not depend on topography at all. Flynn was heavily influenced by Pine Valley and his work there had been replicated conceptually and in the case of the 17th at Boca Raton South very closely. Bunkers, mounds, sandy waste areas and wind influenced play on the hole. Here's Flynn's version (colorized by that 135 pound heavyweight researcher Craig Disher):
Flynn's 3rd (original 18th and scene of Sam Snead's demise in the 1939 Open) at Philadelphia Country Club is a remarkable hole with some of Flynn's best parkland bunkering. There is a wonderful fall-off to the right of the green with a deep bunker. The hole is played from an elevated tee. The first 2/3 of the hole up to the cross-bunkers is flat then there is a rise to the green with the fairway canted left to right. The green slopes slightly front to back.
There is one feature that I cannot believe is not conceptually copied and that is the general nature of the par 4 18th green at Merion. The first half of the green slopes back to front and the back half slopes front to back. This is a very interesting design and results in some very interesting situations and of course a wide scoring spectrum. If I were building a golf course, I'd have at least one green per course with such a design.
Then there is the mighty 620 yard uphill 9th at Rolling Green with its canted fairway. Too bad the bunkering isn't exposed as at Philadelphia Country Club and in the same scale:
The 583 yard 5th at Cascades uses some really nice elevation change, interrupted fairways set at offset angles. It once had a stream across the front of the green but it was turfed over and directed through a conduit due to flooding. In some ways it is reminiscent of the 4th at Merion.
Flynn's B-4 at TCC, Brookline is the 12th on the Composite course and the 8th on Primrose. It plays as a par 5 for members and the hardest hole on the golf course in championship play as a par 4. Steeply uphill with strategic trees on the left:
Flynn was a terrific designer of par 5 holes. And par 4 and par 3 holes for that matter