I've played Sleepy Hollow just south of Cleveland quite a bit. I essentially alternated between it and Ross' Manakiki every Saturday morning (weather permitting and I mean basically no snow & > 40 F) for 3-years.
I don't know, however, how intact it is. Because it's a public course, it may have been less destroyed by greens committees than a private club.
It's a city MetroParks owned course. It and Manakiki are the flagship golf courses of the MetroParks system.
The terrain for Sleepy Hollow is great. Basically 10000+ years ago the land there was a bunch of glacier lakes so it's great rolling terrain. Perfect for parkland golf. Since it's Cleveland city parks, there are signs explaining the waters receeding to the Great Lakes and leaving the rolling terrain. There are also signs describing the local wildife.
It's a great course with a strong set of opening holes.
The front nine is on the top, the back nine on the bottom above.
1 is a pretty easy downhill par 5 (and the site of perhaps the longest shot I've ever made for eagle, maybe 60 yards, no career holes in one here). But 2-4 are tough.
2 is a 200+ yard par three with death to the right (coming back to the clubhouse).
3 is a 440 yard par 3 with trees coming out from the left between the 1st and 2nd shot and a gulley a bit before the green (you can see the fairway stops above, it's the hole in the middle near the top). Very tough hole. I'd call it the toughest par 4 I played in Cleveland.
4 is a long (maybe 560) straight away par 4.
6 is a fun short par 3. Left and/or short and you have to pitch straight up, you're way below the hole. Long you're dead.
They were redoing the 8th green when I left. It was a par 3 with a super steep green. Basically you had to be below the hole or you'd be back off the green if you missed your putt. THey were flattening it a bit.
9 was a medium straight away par 4. It's a much better hole than the 18th. Good green.
The back nine is St. Andrews-esque in that there is just one par three and one par five and 7 par fours.
13 is a pretty hole where you cross a walking bridge to the men's tee then play straight out to the fairway before the hole drops off steeply and you hit to blind green beneath you (unless you boomo your drive).
14, the only par-5 is nearly a 90 degree dogleg left. Your 2nd shot is merely a wedge to get up to the turn unless you want to hit a blind shot over trees, something I've tried many times and succeeding hitting the green only a few times. It's the hole on the far right of the layout above.
15, 16 and 17 are shorter par 4s but wiht plenty of character.
15 has you hitting to a steep elevated green. Tough par if you miss the green.
16 has a rolling fairway with jail left. And you have to hit the right side of the fairway for the best shot into the green. There is a ridge on the where if you hit it correctly, you'll get some added distance and roll into great position for a short approach. If you look closely above (the hole before the hard, short dogleg left 17th) you can actually see the ridge I'm referring to.
17 is a short dog leg left where if you turn it over (for a righty) you can drive the green. Perhaps my funniest golf story occurred on this hole one very rainy Labor Day.
I thought the finishing hole was a bit dull, a straight away par-4 that's perhaps the least memorable hole on the course.
So that was a long answer. And I'm not sure how true to Thompson's original design it is. But it's a fun course, open to the public, that's definitely worth playing if you're anywhere nearby.
I'd also encourage you to his Manakiki, a public Ross course nearby. There are a bunch of Ross courses, including a very early one (Shaker Heights CC) in the Cleveland area.