What is "blindleia"

Blindleia is an long inland waterway in the municipality of Lillesand in Aust-Agder county, Norway. It starts in the Gamle Hellesund or Ulvøysund areas in southern Høvåg in the southwest (near Kristiansand) and it continues northeast past the city of Lillesand. It is a salt water fjord passage that is protected from the open sea by an elongated archipelago of skerries. There are several narrow gaps as part of the waterway, some of them only wide.

Navigation through the passage is detailed but supposedly not difficult—as there are no tides and very little current—with clearly marked buoys and a few lighthouses.