Celebrating its 50th year, Koinonia Conference Grounds is located within a forest of redwood trees in the Santa Cruz Mountains. It is a Christian retreat center with overnight camping for youth groups -- boys and girls. The facility welcomes junior high, high school and church groups for relaxing retreats and adventurous bonding experiences. Some of the daily activities include the high rope (80 feet above the ground), a giant swing and water sports on the lake.