What if the Chicago Spire doesn't get built?

Right now construction crews are drilling 34 holes in the ground going 120 feet deep, 10-feet in diameter. These will be the caissons for America's tallest building, the Chicago Spire to be completed in 2010--or will it be completed? Many still doubt that the building has the financial backing. Even though each hole costs $250,000, that's nothing compared to the $2 billion price tag.

We might end up with 34 really really deep holes in the ground. What should we do with them?

A) Fill them with chocolate.
In the summer they won't melt, because of the cooler underground.

B) Convert 'em into nuke bunkers.
They're underground, so they should be safe right?

C) Missile silos.
Instead of hiding in 'em to be protected from nukes, let's stick our nukes in the holes and use them as cannons.

D) Big soda bottles.
Wait that last one was kinda sad. How about we make some REALLY MEGA-SIZED big soda bottles and store them in there. It's like the next step up from the two-liter container.

E) Underground lair.
Cut out a large space underneath and make super cool underground lair. The holes could be elevator shafts leading down to the lair below.

F) Extreme slip-n-slide water park.
Have a constant flow of water going down the tubes, and it'll be like jumping down a waterfall.

G) Wall climbing gyms.
It will be like you are a gerbil in a mass of underground habitrails.

H) Nap rooms.
Convert them into 14 private nap rooms. When you lay down at the very bottom of the tube, it's 78.5 square feet. Plenty of room for a bed!

Got any other bright ideas? Leave 'em in the comments. Thanks!