This is the area of northern California where the giant Redwoods are located, which is about 150 miles north of San Francisco (drive straight up Hwy. 101). If there is any place that you want to put on your "must see" list, I would say that this is it. Don't go to Muir Woods National Park and say "I've seen the Redwoods." You haven't seen "the Redwoods" until you've gone into the Avenue Of The Giants.
Trinidad - Morley Church is located at a former mining camp, in operation from 1907 until 1956. The remains of the adobe walls of the St. Aloysius Church along with building foundations from Morley, the once-thriving mining camp, still can be seen today off I-25 north of Raton Pass.