Up Helly Aa Fire: Shetland Islands, Scotland
Credit: Jeff J Mitchell / Getty Images

The Shetland Islands off the coast of Scotland were held by Norway for centuries before coming under British rule. Locals celebrate their Viking heritage by donning horned helmets and wielding torches in a procession through the city's streets. Be sure to scope out the route in advance to get a good vantage point for the coup de grace: the burning of a Norse longship that takes months to construct.