Aptly named Sandcastle Estate, this 12-bedroom, 12-bathroom Bridgehampton mansion was once the summer home of Beyoncé and Jay-Z. Compared to the current listing price, though, the power couple got it for a real bargain. When Jay and Bey rented the place in 2012-- which comes with an indoor basketball court, pool, tennis court, and indoor skate park and climbing wall-- they dropped about $400,000 for the month of July. Four years later, a month at Sandcastle Estate will cost you $1 million. If you're looking for a short-term stay you can negotiate down to $550,00 for half the month. Click through to see photos of the incredible space-- we promise you're about to get serious home-envy.