According to NASA, Mars has everything you could need. Recently released NASA pictures taken from either an observational orbiter or a land based rover show much that previously has been unknown to most. All the following are verified Mars photos released by NASA.
This picture shows what appear to be clouds, which reveals an atmosphere.
The blue sky of Mars doesn't appear in most photos due to the red filter NASA uses.
This color photograph shows a lake.
This picture shows a set of lakes surrounded by either trees or shrubs.
More photos of Mars plant life.
This appears to be a cross with a circle of rocks at the base, possibly a burial site.
Mars plant life, and what appears to be squarely marked plots of land.
This Mars monolith is 4 miles tall.