Area 51 in Sweden is constructed under ground in a closed mine that has been sold, and redeveloped.
This man made cave provides a dry iceless place to ride skateboards in all types of weather..
The temperature inside this skatepark maintains a constant average of 58F all year without heater or AC!! And there is never any wind, rain, or snow.
Missouri has a few caves and old mines around.. Hopefully someday we can find the same kinda atmosphere to build a similar sort of facility right here in the middle of North America!