Walking, bicycling, swimming, snorkelling, diving, bird watching, wildlife observation and relaxation are the main activities undertaken by visitors. Many people take interest in Maria Island's history, and most of the island's walks include sites of historic interest. The Painted Cliffs and the Fossil Cliffs are two popular walking destinations for day visitors, both on the island's coastline. The Painted Cliffs are sandstone with beautiful patterns formed through staining by iron oxide. The Fossil Cliffs are tall limestone cliffs containing prolific ancient fossils. Longer day walks include tracks that ascend Bishop and Clerk () and Mount Maria (). Mount Maria is a six- to seven-hour return walk from Darlington while Bishop and Clerk can be completed in about four hours return.