It is the oldest known olive tree on Earth, with a tree ring age of at least 2,000 years. Carbon daters have estimated it to be about 4,000 years old, and it still produces tasty olives today. It is 15 feet thick at the base, is not particularly tall, as olive trees go, but is, quite literally, gnarly. Totally gnarly. The trunk is magnificently swirled, knotted, and bulbous. This one may be the tree Pliny the Elder (23-79 AD) wrote of when mentioning a sacred Greek olive tree 1,600 years o...