This is of special interest to geezers who thought they’ve seen everything. In the palatial hills of Portola Valley the late Jacques Littlefield, a wealthy H-P engineer, built a collection of over 200 tanks. They’re housed in a garage the size of a football field. Even if you’re not interested in military history this is a fascinating, in depth look at a true obsession. Tours are not regularly scheduled but can be arranged. They last roughly two hours with an admission fee of $20.