Haunted House Walking Tours, Pasadena let you accompany a "real haunted house investigator" who takes you into various old buildings in historic sections of LA. On some tours, you'll even get a complimentary psychic reading!

34 North 118 West provides you with walking tours of Downtown, but with a twist (the name of the company should give it away). They arm you with a tablet PC, a GPS receiver, headphones and custom software. No two tours are alike, since the multimedia presentation is based on your realtime itinerary.