A Thermoelectric generator powered by a tealight. It started as an experiment of how much power I could get from one candle. But I liked the idea and it worked.
Travel: Iceland - Land Of Giants, awesome human-like and reindeer-like electric poles!This cool company flawlessly transformed regular and boring electrical pylons into creative parts of the Icelandic landscape." ExPress-O
How Wind Turbines Work (Infographic)
Saw this poster of the EM spectrum years ago.