Driving south on Park Boulevard, from the West entrance, the Ryan Ranch trailhead appears shortly after the road curves east. The half mile trail (one mile round trip) is the old ranch road, making for an easy trek. The natural adobe ruins seem to be blending back into the landscape. I believe this site holds the only original adobe structures in Joshua Tree National Park. An interpretive sign at the trailhead explains the ranch's history. The official name of historical site: "Ryan House and Lost Horse Well."