The Castelhanos Lighthouse, in Angra dos Reis, is a historic 19th-century lighthouse built to guide ships at the entrance of Ilha Grande Bay. The cast-iron lighthouse is one of the landmarks of navigation in Rio de Janeiro state. Access is by trail or boat, and the site offers a panoramic view of the open sea. It is one of the most isolated and scenic spots in the region. Visitation restricted — check with the Navy.