1st answer: The Great Pyramid of Giza, hands down without question. It's a pity it has lost its casing stones else it would last a lot longer, but it'll still gonna be around for thousands of years to come. Such grand scale and staying power.
2nd answer: The Great Pyramid of Giza. Not sure why I would pick something other than my favorite.
2nd answer: The Great Pyramid of Giza. Not sure why I would pick something other than my favorite.