Join this 12 hour day tour of gramvousa an island that serves as a regional bird habitat while there take time to explore the local castle then head over to balos lagoon swim and relax at the lagoon with your group before heading back to rethimno the island of gramvousa is associated with the struggle to liberate crete from the ottoman occupation three thousand revolutionaries used the island as their shelter for 3 years to solve the problem of food scarcity they took to piracy gramvou