Getting here
Grain Earth House
About 1m northwest of Kirkwall at the junction of Scotts Road and Swordfish Road in Hatston Industrial Estate off the A965.
Access to the chamber is by crawling through a narrow passage and can be wet.
Grid reference - HY 442 117.
Journey planners
Search for National Cycle Network routes on the Sustrans website.
Plan your journey by public transport using Traveline Scotland.
Let us know if you spot one of our sites in the wrong location. You can email web@hes.scot.