Mogrovejo is a small village of the municipality of Camaleño. Mogrovejo was declared a historical site and site of cultural interest. Monuments include a medieval tower from the end of the 13th century and the church Our Lady of the Assumption from the 17th century.
The church has a rectangular nave covered by rib-vaults, with a baroque altar, and a 16th century crucifix. The baroque altarpiece contains the coat of arms of Mogrovejo, highlighting the sculpture of a flaming Virgin from the late 15th century, and a Gothic-Flemish image called 'La Milagrosa' from the 15th century.
There are also mansions of the seventeenth and eighteenth century with forged balconies, some within large parcels surrounded by high walls and monumental entrances.
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Trullhalsar is a very well-preserved and restored burial field dating back to the Roman Iron Ages (0-400 AD) and Vendel period (550-800 AD). There are over 340 different kind of graves like round stones (called judgement rings), ship settings, tumuli and a viking-age picture stone (700 AD).
There are 291 graves of this type within the Trullhalsar burial ground, which occurs there in different sizes from two to eight metres in diameter and heights between 20 and 40 centimetres. Some of them still have a rounded stone in the centre as a so-called grave ball, a special feature of Scandinavian graves from the late Iron and Viking Age.
In addition, there is a ship setting, 26 stone circles and 31 menhirs within the burial ground, which measures about 200 x 150 metres. The stone circles, also called judge's rings, have diameters between four and 15 metres. They consist partly of lying boulders and partly of vertically placed stones. About half of them have a central stone in the centre of the circle.
From 1915 to 1916, many of the graves were archaeologically examined and both graves of men and women were found. The women's graves in particular suggest that the deceased were very wealthy during their lifetime. Jewellery and weapons or food were found, and in some graves even bones of lynxes and bears. Since these animals have never been found in the wild on Gotland, it is assumed that the deceased were given the skins of these animals in their graves.