Blindleia is the sheltered waterway west of Lillesand, threading between islands and the mainland towards Kristiansand. It is the coast at its most charming: white houses, red boathouses, smooth rocks, narrow sounds, and boats moving slowly through protected water.
If you can take a summer boat trip, do it. From land you can see pieces of the landscape, but the logic of Blindleia only really makes sense from the water.