Oheka Castle, the 127-room Long Island estate that inspired 'The Great Gatsby,' is heading to auction. Look inside.

An aerial view of Oheka Castle. J. Conrad Williams, Jr./Newsday RM/Getty Images Oheka Castle, the second-largest private home in the US, is headed to the auction block. The estate is said to have inspired "The Great Gatsby," and has been used in film and TV. It's also a favorite wedding venue for celebrities, such as Kevin Jonas, Megyn Kelly, and more. If you've ever read or seen "The Great Gatsby," you know 1920s New York was home to extravagant mansions with owners who hosted lavish parties — and if you've watched "The Gilded Age," you know those parties began decades earlier in the 1870s. And if you're a really dedicated fan, you can own a piece of F. Scott Fitzgerald history yourself.