The area surrounding Trehörningen, Orlången and Ågestasjön, is a fine example of a historical landscape evolving from a prehistoric settlement into a traditional agricultural village discontinued in the 19th century, encompassing structures from all interjacent eras.

During medieval times, the area contained the only farmstead exempt from land dues (i.e. owned by a member of the Swedish nobility) in Huddinge.

Nevertheless, the shores of the lakes are of significant recreational importance as they border the Orlången Nature Reserve and contain several cliffs popular for bathing and angling.

Both major inflows, Fullerstaån and Solfagradiket, are guided through culverts under neighbouring settlements, but reaches the lake through open ditches.

Along the shore are some 30 species of trees and plants, including alder, birch, aspen, spruce, sedges, loosestrife, forget-me-nots, cinquefoils, and water-pepper.