When travellers first set foot on the windswept beach in Tulum, flanked by Mayan ruins and edged with cabanas and yoga shacks, they often remark on the special vibes of this stretch of coastline on the Mayan Riviera. With its blend of ancient archaeological sites (dating back to 750 BC), a biosphere and an underground network of water caves - it is a world apart from the Spring Break shenanigans of Cancun. Here, beautiful bodies with a taste for super nature abound.