They're everywhere.
http://www.photogrammetry.ethz.ch/research/3Dmodels/nasca.html
This lot must have been there before 'something' tore away the mountainside...
has google improved resolution of the nazca area? i looked a few months ago and you could make out the largest lines but not much else.
hopefully they plan to do improved detail of archeologically interesting areas; the path of hadrians wall would be interesting for all the crop-marks you could make out of the unexcavated forts, for example. The nazca lines are an obvious one too.
the nazca lines are one of the single most puzzling man-made monuments ever to me, as far as motivation goes. Practically any religious contruction of that magnitude is dual-use, i.e. while dedicated to god xyz, it is intended to either be used by mortals or be viewable as a symbol of power, majesty, etc. The nazca lines do not fit this category.