These well-known estates have creepy pasts . . . and price tags that are almost as disturbing. Haunted? Who cares—you wish you lived here. Location: Schweppe Mansion in Lake Forest, Illinois Price: $12,000,000 Size: 24,500 square feet Key selling points: This early-20th-century mansion was inhabited by Charles Schweppe, one of the heirs to the Schweppes carbonated-drink fortune, and his even-wealthier wife, Laura Shedd Schweppe—and it was rumored to be their domicile for many years after their sudden deaths, too. And now that it's been restored to its former grandeur, it's not hard to see why they'd want to stick around.