In the landscape around Port Arthur, sclerophyll forest (typical Australian vegetation, with spiky, drought-tolerant leaves) meets hard dolerite rock in Tasman National Park. The park covers more than 100 square kilometers (about 40 square miles) and is bordered by spectacular sea cliffs. It provides a habitat for eagles, wallabies and echidnas, the rare egg-laying spiny anteaters. A good way to see the park is from the water, on a carbon-neutral boat tour run by Pennicott Wilderness Journeys. You'll witness sea caves and jagged rock formations along the coast while looking for dolphins, albatross, penguins and whales (viewable between October and December).