On the east side of town, this excellent archaeological museum has an aqueduct running through the back garden, as well as interesting reproductions of burial tombs, a valuable collection of ceramic pan flutes and a scale model of the Lines.
You can get an overview of both the Nazca culture and a glimpse of most of Nazca’s outlying sites here. Though the exhibit labels are in Spanish, the front desk lends foreign-language translation booklets for you to carry around. To get to the museum follow Bolognesi to the east out of town for 1km, or take a taxi (S3).