The world’s largest petrified trees can be found just up the road in Calistoga.
The Petrified Forest features both a Main Trail and Meadow Walk, the latter a 75-minute, docent-led tour available only at 11 a.m. Saturdays and by appointment, weather permitting.
Location: 4100 Petrified Forest Road, Calistoga
More information: 707-942-6667, www.petrifiedforest.org
Reach John Glidden at 427-6981 or firstname.lastname@example.org. Follow him on Twitter at www.twitter/glid24.