The Hsi Lai Temple is a Buddhist Temple.  They have a large temple complex and are used to getting visitors of all kinds, including many students from Southern California universities.  They have recently established the Hsi Lai University.

The International Society for Krishna Conscoiusness has a Los Angeles Temple that hosts very many students each year doing papers similar to yours.  You can link from the LA site into the Hare Krishna Homepage.  They are about thirty minutes from campus -- for directions, click here, and for maps, see their website.

The Islamic Center of Southern California is on Vermont Avenue in downtown LA and the kind folks there have always graciously received student visitors.
 

The Wayfarers Chapel is a beautiful place to visit.  It is in Palos Verdes and is run by the The Swedenborgian Church.
 

The Cathedral of Our Lady of the Angels is the new Roman Catholic Christian cathedral for the diocese of Los Angeles.
 

The Mt. Baldy Zen Center is practices Rinzai Zen Buddhism  It is a monastary and retreat center that also hosts non-Buddhists for conferences and meetings.  Their primary activity, of course, is religious.  Their headquarters is close by -- Rinzai-ji Zen Center, 2505 Cimarron Street, Los Angeles, 90018.  Phone 323-723-2263.