Lunan is a hamlet in Angus, Scotland, in the parish of the same name, 6 kilometres (3.7 mi) south of Montrose. The hamlet overlooks Lunan Bay, which is itself also a hamlet, at the mouth of the Lunan Water. A 16th-century priest of Lunan church, which is in the hamlet of Lunan Bay, Walter Mill, was one of the last Scottish Protestant martyrs to be burned at St. Andrews. The church itself was rebuilt in 1844. The 15th-century Red Castle, so called from the red sandstone it is built from, is located 500 metres (1,600 ft) to the south of the hamlet, on the south bank of the Lunan Water.