This $13.4 million Carnegie Hill home has 13 rooms and three outdoor spaces…and all of the incredible features any Park Avenue limestone townhouse should have… like a butler's pantry, a gorgeous oversized eat-in-kitchen, high ceilings and original wood mantle fireplaces.

But the fun happens in the funky indoor game room/kids' bedroom, complete with a basketball hoop and gym-like flooring, a loft bed you can climb up to and a punching bag hanging from the ceiling.

Luckily, in a single-family home you don't have to worry about downstairs neighbors complaining about a competitive Saturday morning one-on-one.