This big boulder of  Malle-Musse-Grethes Trone, Mallemose Grethes Trone or simply Grethes Trone is found deep into the forest of Hasselø Plantage. Around 30 metres north of the address is a gravelroad, leading north-east. Into the forest by the gravel road, 30 metres north of the address, for about 230 metres, then 110 metres south-east, through the dense forest.

Location: Gedser Landevej 3, 4800 Nykøbing F.
GPS: 54.739167, 11.923611 / 54°44'21"N 11°55'25"E

Size: 0,7 metres high, 2,9 metres wide and 3,5 meters long. The circumference is 9,8 meters.

Meaning of the name: The thrown of  Malle-Musse-Grethe, a elf-girl who lived here.

Material: Gneiss

Origin: ?

Legend: It is completely worn hole in the middle because Malle Musse Grethe through hundreds of years have sat and rested on the stone. Malle Musse Grethe is an elf-girl, and she's very dangerous to meet. It happened once for a groom from one of the farms nearby. He was in the bog and work with his horses, and it was late, until he was finished. It was twilight when he started to leave.
When he comes to the stone he meets the beautiful girl he has ever seen. He'll want to talk to her, yes, so much that he let go his horses and let them stand in the road as he walks toward the girl. But for every step he takes, she moves a step away from him. He is now absolutely eager to get close to her and talk to her, and he starts to run towards her. However, the stronger he runs, the stronger she runs. Inside the man's head it too runs fast, so fast that he eventually did not know who he is and where he is.
The horses did not wait for the man. They even went back to the farm, and when they came home without servant, people on the farm feared of what could have happened to the servant and went out to look for him. They looked most of the night before they found the servant who stood holding of an old hollow willow tree, which he said a lot of confused love to talk. The farm people got, with difficulty, brought the servant home to the farm, where he lay sick for almost a year before he was himself again. It takes a long time to recover when you have been elf-struck!