Much of the island of Öland has been designated a world heritage site by UNESCO in the form of the Stora Alvaret nature reserve. This reserve is home to a vast number of rare and endangered species due to the presence of an enormous limestone barren, which is the largest such formation in Europe. Route 136 is virtually the only spinal link allowing vehicle access to all parts of the Stora Alvaret.
A considerable area of Öland's island has been designated a world heritage site by UNESCO in the form of the Stora Alvaret nature reserve. This reserve boasts an impressive diversity of rare and endangered species due to its unique limestone landscape, which is unmatched in Europe. Route 136 serves as the primary route connecting all areas of the Stora Alvaret.