They say that early explorers used to get their way with less-technologically-savvy inhabitants by pointing at the sun just at the moment of a pre-determined eclipse and dramatically threatening to make the sky go dark. Not sure if that still works, but I'm giving it a try. Cue the ominous music, please

The Greek island of Aegina will go dark at 8pm this Saturday, March 29th.

But, fortunately, it's for a happy reason. Greece has designated Aegina to be its participant in the worldwide Earth Hour, an Australian scheme to cut world energy usage for an hour. The lights will come back on at 9pm.

Aegina is a charming island that's often included on three-island day trips out of Athens, and its home to Greece's largest Greek Orthodox church and to the Temple of Aphaia, a well-preserved site dedicated to a local mermaid goddess .

• Greek Island of the Week - Aegina
• Aegina Photo Gallery