In Belize's idyllic beach town of Placencia, the buzz of blenders has become something of a soundtrack. The once-quiet fishing village, which sits on the point of a 26km-long southern peninsula flanked by the Caribbean Ocean and a wildlife-rich lagoon, is often described by locals as "the caye you can drive to" because of its laid-back atmosphere. When temperatures soar, locals and travellers head to gaily painted beach bars that not only serve cold daiquiris and piña coladas but also a Placencia speciality: the seaweed shake.