Others report what is known as orthostatic intolerance, meaning they might develop worsening symptoms when they change positions, such as sitting down or standing up.
The first are square or rectangular with rounded corners, the base course occasionally consisting of orthostatic slabs.
Near this last site was also found a round hut based on a course of orthostatic slabs of typically megalithic appearance.
They are oval in form and have in many cases a base course of orthostatic slabs.
It has a concave façade of large orthostatic slabs with horizontal blocks set in front of them to keep them in position.