NASA have lot of high resolution pictures, but they not post all photos for public. Some photos are still secret.
Yes, Pyramids Exist on Mars. but they are in bad condition.
A million years ago, people lived on Mars,
Other structures also exist on mars, like, ancient building, similar to Mohenjo-daro , Machu Picchu, The Kailasha or Kailashanatha temple is one of the largest Indian rock-cut ancient Hindu temples located in the Ellora Caves. This is just few examples. A Two hundred thousand years ago, there everything is destroyed. Who destroyed mars planet ,it is not yet known.