Nature reserve


Nature reserve

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The Korshamn nature reserve is located on the north tip of Malmaön island. The area contains numerous glacial potholes, also called giant's cauldrons, created during the last Ice Age. They were formed by strong water currents below the ice surface which caused rocks and gravel to erode holes into the bedrock. The largest of these potholes is 6 m in diameter!

The vegetation in the reserve consists of pine and spruce forests.

Activities And Facilities

  • Nature reserve Nature reserve


Skyddat sedan: 1962

Storlek: 1,3 hektar

Karaktär: barrskog, geologisk formation, skärgård

Kommun: Värmdö

Markägare: staten

Förvaltare: Länsstyrelsen

Skyddsform: naturreservat


By public transit: Malma kvarn is the closest bus stop, about 4 km by foot from the reserve. There's a beautiful path that starts at the parking lot. For current information on public transit, see:

By car: Take Route 222 towards Malma. After a 7 km drive on Malmavägen road, the parking lot will be on the left, just before you reach the reserve. It is clearly marked.


In order to protect the Korshamn nature reserve, please respect the following rules.

Within the reserve, it is forbidden to:

  1. destroy or damage permanent natural structures or surfaces,
  2. break branches, fell or in any other way damage living or dead trees and bushes or damage the vegetation in general,
  3. deliberately disturb wildlife,
  4. make a fire,
  5. put up a poster, sign or similar.


Email address

Länsstyrelsen i Stockholm

[email protected]

Questions & Answers

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