These are some big trees!
My wife and I recently visited Sequoia & Kings Canyon National Parks, where we marveled at the Giant Sequoias. I think this photo provides an adequate sense of how incredibly massive these trees are.
This particular tree is named Auto Log. It is a fallen giant sequoia large enough for a car to park on. Unfortunately, the log has begun to deteriorate and the log can no longer support the weight of vehicles. Too bad!