As the conversation is far-ranging I'll add these tidbits -
Brae Burn CC - (NY) - Brae Burn was Frank Duane's first solo design coming out of the RTJ shop...the property he was given was nearly bisected by an abandoned rail line, which had various remaining features...stone tressels, steel bridge works and raised rail beds. A good portion of these remnants were"built-in" to playing features - in the water-filled stone trestle that concerns shots on #15 and #17 and most prominently in the creation of the fifth tee, a J-shaped snake with a width of nearly 100 yards built directly atop a northern section of rail bed before it exits the property. Though it;s been broken into smaller sections by contemporary maintenance practices, in its original presentation, it had to be the widest tee in all of golf...like Guinness Book stuff.
Newtown CC (CT) - classically awkward local nine-holer which has that "Flight OB" pole that Ken M. mentioned between the right sides of its 9th and 2nd fairway.
Ardsley CC (NY) - like Tom W, posted on Manufacturers, Ardsley had a mining cart-style transport between the 18th green and the clubhouse. I can't remember if any vestiges of it remain, but the 18th hole/green site was shortened and brought closer in elevation to the clubhouse some time ago...making use of the transport obsolete.
Rockrimmon CC (CT)- from 1949 - 2003, Rockrimmon had an elevator "tram" to ferry players from the 9th green to the 10th...once a part of Rockrimmon's logo, it had also been advanced as the world's (nation's) shortest interstate railroad. However that is a myth as the CT/NY state line was still some 40 yards away from any intersection with the tram-railroad. It was originally installed and then maintained by Otis Elevator for many years...but when it was having a big repair in summer 03, it came off the brake when the cable itself was being repaired, flew down the 80 yards of track...hit the up-sloped endrails and exploded in a shower of plank splinters and bent iron frame parts, tumbling almost another 50 yards to the water's edge in front of the 9th green...
In the modern administrative perspective, it was too costly to repair or re-insure and so was grassed over by the end of 03. It's removal after failing to restore it was controversial...to the extent that an expensive monument plaque was budgeted to mollify the opposition and mark the tram's little history, but when purchased and installed was removed after one weekend for it inflamed debate about why the tram had to go at all... Like an $8000 thing vaporized in contentious politics.
A last tidbit is that Rockrimmon is originally an RTJ 1949 design (tram and all), whose 18 hole plan was, however, executed and altered by Orrin Smith fou years later . RTJ's plan was to have not the one, but TWO trams...the other was to be between two uphll par 3's (roughly, the current 7th and the 17th) but the idea abrogated when Smith changed the RTJ plan.
cheers vk