At 38 kilometers long, Moreton Island is one of the largest sand islands in the world, and has the highest dunes, including Mount Tempest - 280 meters. Most of the island is National Park and offers beaches, freshwater lakes, wetlands and wildflowers. Fishing, snorkelling, swimming, sailing and surfing are popular, but sand boarding in the dunes is the most exciting. Humpback whales can be seen in the area from June to November.