Interspace Mars colony

Picture of the Day 31/8/15 - A drawing of a Mars colony from the website of "Interspace" - a Mars-themed attraction park in Titusville, Florida (near Kennedy Space Center) which will hopefully open in 2016 and house "the largest indoor Mars simulation in the world". It's one of the entertainment & education projects of 4Frontiers Corporation, a space commerce company focused on the settlement of Mars.