Cascades, at Koonya, is the Tasman Peninsula's best-kept secret. Stay in a waterfront environment, have access to a private family museum and explore convict remains including a cell block and mess hall. There are also two stunning bushwalks on the property, one that follows the waterfront to the site of a convict jetty and another that follows a convict trail into the rainforest to the ruins of a convict mill and quarry site.