Does abandoned hall trigger on rtw

Yes — moving a unit to Abandoned Hall with Ride the Wind gets it the +1 Might.

Abandoned Hall's "when a player plays a spell" trigger checks in only after the spell finishes resolving, so the unit is already sitting at the Hall when the trigger goes on the chain and resolves (FAQ #12824, CR 383.2.c). Note the direction matters: Ride a unit away from the Hall and the trigger still fires, but you'd have to buff a different unit still there — and you can't Ride to the location a unit is already in (Rule 355.4.a).