Terry- New Castle has fabulous terrain, a great set of greens (including a wonderful punch bowl on the short 11th) and one of the coolest par fives I have seen: #5, a decent length par five which bends left until about 100 yards from the green where the fairway is interrupted by a 40 foot drop over a wide creek that runs in front of and to the right of the putting surface. The approach shot, downhill and sometimes semi-blind, has a high pucker factor. There are some other very fine holes here with neat design features: a short par four with a fairway split by a creek which is a true risk/reward hole (challenge the creek and have a short approach with the optimum angle, lay up on the open side of the creek and the approach has to deal with a devilish bunker on the front left of the putting surface), another short par four with an approach to an elevated green with a wicked false front. This is a terrific golf course and a true hidden gem. It's tucked in extreme Western Pennsylvania close to the Ohio border...which may explain why it flies under the radar (the Youngstown/New Castle metroplex is not exactly a destination spot).
I have heard good things about Sunnehanna and have been trying to get there for the past couple of years. Next year it will happen.
A very doable and enjoyable doubleheader would be New Castle (Tillinghast) and Youngstown (Travis/Ross) in the same day.