The Nazca lines are some pictures (some animal form, some geometric, and even a alien) and is only a little bit away from Nazca desert. Nobody knows how it was done, who did it, or why. There is an observatory, named Maria Reiche to honor a German scientist who devoted her life to studying, but it's best to get on a small plane piloted by locals and see them from the air. They are lovely and intriguing. Yes, careful because the plane does not stop turning from one side to another so all passengers who are seated next to the windows can see.