Now I know we're going down a conspiracy rabbit hole with these destinations but the pyramids are a must for any person who is fascinated by engineering. The structure, direction, and fact that they were built in 2575 bce is super fascinating and proves there is engineering still left to be discovered. I love that there are so many unknowns on Earth and if i had an infinites budget I'm taking advantage of every unexplainable spot and looking at it through engineering eyes.