Built in 1857, the Whaley House in Old Town San Diego is a preserved Greek Revival residence that has served as a family home, courthouse and theater. The museum bills itself as 'America's Most Haunted House' and offers daytime tours, evening ghost tours and after‑hours paranormal investigations. Visitors hear tales of the Whaley family and reported spirits, and many believe the site is haunted.

The retired ocean liner RMS Queen Mary, permanently moored in Long Beach, operates as a hotel and tourist attraction. For decades the ship has been associated with ghost stories, and official tours market it as a haunted attraction with reported paranormal experiences in its engine room and former swimming pool. Paranormal investigations and themed tours are offered to visitors.