In February 1917, Albert Einstein wrote in a letter:
It is a pity that we do not live on Mars and just observe man’s nasty antics by telescope.
Well, things now have changed. Here are some of my favorite images coming from NASA/JPL/University, part of HIRISHE (High Resolution Imaging Science Experiment).
Dunes Dubbed Kolhar
Full size: http://www.uahirise.org/ESP_046312_2650
Colorful Bedrock in the Central Uplift of an Impact Crater
Full size: http://www.uahirise.org/ESP_045519_1730
Layered Sediments in Cerberus Palus Crater
Full size: http://www.uahirise.org/ESP_046242_1845
Layers in Buttes in West Arabia
Full size: http://www.uahirise.org/ESP_046234_1845
Beautiful texture in North Sinus Meridiani
Full size: http://www.uahirise.org/ESP_046287_1860
Finally, a Candidate Landing Site for 2020 Mission in the Kashira Crater
Full size: http://www.uahirise.org/ESP_046512_1525
You can interactively navigate each picture on google maps at the http://www.uahirise.org