Outside fort is a roughly circular dun with thick wall and single entrance. Gigha Island Gaelic for 'God's Island', area scattered with fort remains and standing stones. Achamore House Gardens has 50 acres of flowering trees and shrubs. Bicycle hire from post office. Glen Rosa Glen climbs from coast to 2618ft Cir Mhor with Glenrosa Water flowing through it.
Glacial terrain reveals huge granite boulders.
Holy Island St Molaise reputedly lived in a cave here and died in AD 639, after accepting 30 diseases at once to avoid purgatory. Visit this cave by boat and see runic inscriptions. Kildonan Quiet hamlet with hotel facing sandy beaches broken by rocky outcrops. Ruined medieval castle to east. Views of lighthouse on island of Pladda, and Ailsa Craig on horizons.