The Obelisk of Ramses II at the Temple of Luxor. It is 82 feet tall and weighs 254 tons. Its mate, which was located several yards to the right, was removed in the early half of the 1800's and  is now at  The Place de la Concord in Paris. Note the fellow standing at its base for scale. For a nice QuickTime view of this obelisk, click here.