People sometimes wonder what the smokestack-looking thing does, on the east side of the park, in the green fence. It’s of course the Flare Station. Various gases generated by the garbage under the surface, chiefly methane, get channeled through 12,000 feet of underground pipe to this million-dollar device, which burns the gases at 1400 degrees F and converts them into carbon dioxide and some byproducts. The burning takes place at the base of the stack, and the exhaust comes out the top. On hot days when the sun is right, you can see the shadows of the exhaust gases on the ground, as in the video above.