Inside the enormous Hamptons mansion where celebrities like Beyonce and Jay Z regularly stay for $1 million a month

The Sandcastle sits on 11.5 acres on swanky Halsey Lane in Bridgehampton, New York.

It has about 31,000 square feet of living space.

Here's the formal living room, complete with an intricate ceiling design and fluffy pillows.

The kitchen is absolutely enormous, and has a walk-in refrigerator.

The dining room comes complete with a massive chandelier.

Here's a look at the wood-paneled office, in case you need to get some work done.

The family room is modern and eye-catching, with a coffered ceiling.

The bowling alley is a nice perk if you're into that sort of thing.

As is the "Air Lounge", a children's entertainment center with virtual golf, a half-pipe, and a rock climbing wall.

Of course, there's a movie theater with a ceiling that mimics the night sky.

As well as a gym and basketball court.

You can also play squash and racquetball.

The spa is the ideal place for relaxation.

For news junkies, this room has 5 different television screens — perfect for keeping track of what's happening in the world.

The master suite alone measures an impressive 2,800 square feet.

The lavish closets and dressing rooms take up much of that space.

The master bathroom looks more like a ballroom than a place to bathe.

There are 12 bedrooms in total.

Here's the view from the master suite, with the pool house on the right.

The pool house is lavish in its own right.

An underground hot tub sits out back.

The main house sits close to the 60-foot by 20-foot heated pool, which has an underwater speaker system.

There's also a sunken tennis court.