My friend and I sent a weather balloon carrying two GoPros to 80,000 feet above central California
Some lovely photography:
Payload was extremely low-tech. A shoebox wrapped in duct tape, it carried two GoPro Hero 2 HD cameras and a SPOT GPS. The balloon was supposed to carry the cameras to an altitude between 80,000 and 100,000 feet (24-30 km). It would drift south and eventually land in the southern Mojave Desert.
Via /r/pics.