Friends Of Vast Industrial Concrete Kafkaesque Structures - Photo journal, industrial photographs of the Los Angeles River flood control channel. Industrial Archaeology in California - Abandoned buildings in Richmond, Berkeley, Oakland, San Jose, and LAX airport, and ghost towns near Santa Cruz. Bevatron - A photo-essay about the Bevatron, a venerable and recently decommissioned accelerator at the Lawrence Berkeley National Laboratory. California. Sutro Baths - Modern ruins of a bath facility off the coastline in San Francisco, CA. San Francisco Artillery Fortifications - Disused fortifications and tunnels near San Francisco. Flickr: Old Zoo - The old zoo, located in Griffith Park, Los Angeles. Places That Were - A site devoted to urban exploration and the appreciation of abandoned places. Flickr: Abandoned California - This group is a collection of photos of the abandoned locations all around California. Urban Adventures Los Angeles, CA Meetup - Group for local explorers. Art of Urban Exploration San Rafael, CA Meetup - This a group for photographers who explore urban areas seeking a particular aesthetic. The Urban Exploration Photography Blog - By Ritchie Roesch, California based. Graham Gilmore - A collection of urban and abandoned photography using advanced photographic techniques. Based in Pasadena, California. Zero Occupancy Urbex - Twitter - Urban explorers. San Diego, CA. Amy Heiden - A preservationist who photographs the abandoned and forgotten world. Based in San Francisco.