WALK THE RED CRAB CARPET.
Where: Christmas Island, Western Australia
You won’t see anything like this anywhere else. Every year, when the first summer rains begin to fall, 50 million red crabs march, en masse, from the lush rainforest in the middle of Christmas Island (a 3.5-hour flight from Perth) down to the sea, where they mate and spawn in the world’s biggest beach party. It’s an extraordinary sight, with roads and pathways across the island transformed into rippling red ribbons of crabs that cover every obstacle in their path. There are even special crab bridges to help them get across the roads! The migration lasts up to 18 days, and it’s just as impressive when the crabs make their way back to their burrows in the rainforest post-beach-party.