Brightly-colored plants grow on the West Lawn and Terrace outside of the main cellblock at Alcatraz Prison, San Francisco.
A flower spotted at Addison Circle Park, Addison, Texas.
Grass growing in the spaces between bricks, spotted on the campus of Tyler Junior College, Tyler, Texas.
A plant bakes in the Nevada sun at Valley of Fire State Park.
A purple, yellow and green plant spotted in a cemetery at Dzemul, Yucatan, Mexico.
Three black-eyed-susans spotted somewhere in East Texas.