The Emerald Isle earned its name as drone footage caught a rainbow curving beneath the green waters of Lough Foyle, Donegal in Ireland. <br /><br />The drone photographer spotted the rainbow around 7:00am on September 28, and sent up his drone to the legal height limit of 120m to catch it arcing through the water.<br /><br />The lough's tides stir up sand and sediment beneath the surface, causing the beautiful cloudy formations to form beneath the surface.