This Old Town complex of historic buildings consists of the 1856 Whaley House, the 1870s Verna House, and the circa 1850 Derby-Pendleton House. The Greek Revival Whaley House was the first two-story brick structure in San Diego, and during its heyday served as a family residence, theater, county courthouse, and general store. Don't be surprised if you spot a ghostly apparition or two – it's said to be the most haunted house in the US. After hours tours are available (make reservations at least two weeks in advance, minimum of two people), and last one to three hours.