A 30+story skiTower is his  vision, with indoor broad band ski trails spiraling from the top. Ski touring and hiking facilities widen the scope for sport enthusiasts. Trail side rest areas improve the skiing flow, and each stop simulates "a virtual view"  from inspiring mountain tops. It gives advanced skiers a true skiing experience, and brings beginners quickly to higher levels via a high Tech ski gymnasium. 
  Center   Elevators
   Concert  stage
      Hiking Trail
   New is a shuffle 
Beginner Trail
Main Trail
This sample  is just the core idea  for a  gargantuan project.                       
A fitness center has existed in Grand Central Terminal since the 1960’s, originally in the form of the Vanderbilt Athletic Club, which featured two clay tennis courts (and oddly, a 65-foot indoor ski slope). However by the 80’s this club had fallen into disrepair. In 1984, thanks to a number of sweetheart real estate deals, none other than Donald Trump leased the space and opened a new tennis and fitness club. Trump renovated the aged space, turning its third floor annex into an uber-exclusive court for the rich and famous, hosting movie stars and celebrities willing to pay in cash (no credit cards accepted). The now spotless clay courts operated in semi-secrecy for 30 years until Trump’s lease, having been month-to-month for the final decade of its existence was finally given over in 2009 to create, surprisingly not an even more exclusive space, but a full-service lounge and rest area for MTA workers. However, the dream of train station tennis was not yet dead. While Grand Central went without a tennis court for a couple of years, the Vanderbilt Tennis Club moved into the fourth floor of the station in 2011. This new location features a regulation-size tennis court, practice courts and other limited fitness services. While not as exclusive as Trump’s courts, the costs (around $100-$250 an hour) do seem geared towards a certain economic echelon.The main court is actually located behind the top portion of the famous facade window, so next time you look at that famous architectural spot remember that you could get a few rounds in if you’ve got the money.  

Adi's first experience with indoor  skiing goes back to the early 60's. The Hungarian fencing champion "Geza"  operated the Vanderbilt Athletic Club, a tennis club in Grand Central Station, Manhattan, and approached Adi to set up a ski slope. Adi came with bristle matts and his wife Helga conducted ski lessons. Both were to busy with the out door ski world to stay involved, but Adi  wondered ever since what a viable indoor resort should look like. As snow making came of age he revealed the following idea:
Figure 8th  versionis  possible
Helga teaches skiing in    Grand Central Station                   
Vanderbilt Athletic Club      
The following article has recently been posted on the internet.

As said, today there are a number of indoor skiing facilities (30+ worldwide) coming closer to Adi's vision. How close?  See "Wintastar" on the web, or  "Snow Dome" N.J. It is a beginning, and may embrace  Great Skiing/Music & Dance.  An other option is a training program  similar  to:                                                                                                                                              Mt To m