HOUSE OF THE DAY: Billionaire Bill Koch Buys The Mellon Compound On Cape Cod For $19.5 Million

Here's the main house.

And the view from the water.

One of the smaller buildings (it had been listed separately).

This is how you get to the water.

A nice spot for a picnic.

Manicured lawns.

As you can see, the word compound is really appropriate.

Is this a "yard"?

A view of the river.

The Cape Cod estate was just a small piece of the Mellons' real estate portfolio.

The Incredible Real Estate Portfolio Of Banking Heiress Bunny Mellon >