The comet 67P/Churyumov-Gerasimenko has small cliffs that stretch across the landscape for months at a time.
The European Space Agency’s Rosetta spacecraft has provided amazing images of the comet. Its truly incredible to see boulders which look so familiar on a comet. One could imagine walking through the various pathways exploring each section of rock.
See this incredible video from the Agency
Rosetta arrived at 67P in 2014 and orbited the comet for two years. The pictures show a changing landscape. When the comet approached the sun, dust and gas were seen fired off from the surface into space.
It is a Jupiter-family comet originally from the Kuiper belt. It was first seen on in 1969 by Soviet astronomers Klim Ivanovych Churyumov and Svetlana Ivanovna Gerasimenko. There are 26 different areas on Churyumov–Gerasimenko, with each named after an Egyptian God.
Read more:
http://www.esa.int/Our_Activities/Space_Science/Rosetta/Rosetta_image_archive_complete
https://en.wikipedia.org/wiki/67P/Churyumov%E2%80%93Gerasimenko
For an extremely detailed survey try this:
https://academic.oup.com/mnras/article/462/Suppl_1/S352/2420712
