Image courtesy of Park Circus/Universal.

Two urban explorers are seeking the next big thrill and may just have found it in France: There is supposed to be a whole estate at the bottom of a lake, a lost family villa, with algae floating and fish swimming through its many rooms—and a grisly secret at its dark, wet heart. While The Deep House was filmed using modern GoPro and drone technology, it is a decidedly old-fashioned horror thriller, a surreal diving expedition through a haunted house submerged in murky waters. The premise alone makes it one of the most extraordinary genre movies of the year.