Tony Stewart Lists $30 Mil Indiana Ranch W/ Indoor Waterfall, Aquarium & Game Room

NASCAR legend Tony Stewart is selling his massive Indiana ranch -- and once you see how ridiculously awesome this house is, you'll see why it's got a $30 million price tag!

This 20,000 square foot estate sits on 415 acres in Columbus, IN -- less than an hour from Indianapolis -- and is built out of luxurious lodgepole pine.

The place is awesome. It has a two-story waterfall, a trout stream and an 8,700-gallon aquarium right in the entry.

There's also 6 bedrooms, 11 baths (8 full, 3 half), a gigantic kitchen with fancy appliances, a 4-car garage (of course) and a guesthouse.

For entertainment, you've got lots to pick from ... including a 2-lane bowling alley, full golf simulator, an onyx bar and a game room that looks like a Vegas casino.

You can also dive in the 9-acre stocked lake in the backyard or if you're a fan of hunting, this land is a licensed hunting preserve that has a bunch of elk, deer and more.

The two-story mansion, that was built in 2011, was just listed with Carrie Holle of Compass Indiana and can be yours for $30 million.

Why would Stewart sell such a beautiful place? We're told it's because the 3x NASCAR Cup Series winner is never home and always on the road.