Architect Jakob Tigges floated the idea for the grounds of the retired Tempelhof Airport. The Dutch plan would be to build on a landscape that has already been dramatically altered, with an artificial lake and other large-scale earth moving. A sports journalist actually proposed the plan first, suggesting the mountain could be used as "...a recreational space, an iconic landscape with spectacular views, and a popular destination for climbers and ramblers."
Comments
Sounds like what they did in
Sounds like what they did in another place of flat-ness—Saskatchewan, Canada.
For the 1971 Winter Canada Games, a 45m high ski hill was constructed. The run was longer as it continued down into a valley.
It closed as a ski hill by 2008.
See http://en.wikipedia.org/wiki/Blackstrap_Ski_Hill for more information.