Tethered, helium-filled balloon at the "Burning Man Festival" in Nevada (see also our picture gallery on smoke rings for more info on this festival). The balloon in this photo was built by the Raelian Movement, an international religious organization with 55,000 devotees worldwide and operating its own theme park, "UFOland", near Montreal.

[Photo by Tristan SAVATIER - used with permission (more photos of the Burning Man Festival can be viewed on www.playa-dust.com and on www.burningman.com)]