My dad works for EA.... wait thats not right.
My dad teaches architecture in the glasgow school of art and he was telling me about one of his students who, for a project, designed a building with a big air kicker on the top of a disused piece of bridge supports on the river in the centre of glasgow. i dont know if its meant to be a dry slope or man made snow, but it looks sick so i thought it would share. its also got another slope so you can work on rail game at the same time. heres the drawing and the model of the building
as freeskiing becomes more popular this sort of thing could be viable and awesome esp for places like the UK where the biggest kicker is a 20/25ft dryslope kicker.