Brumalia Tholus (Vesta)
Roman festival of Bacchus celebrated on the day of the winter solstice.
A tholus is a small domical mountain or hill. On Vesta they are named after places and festivals associated with vestal virgins.
Image Source. Marker locations are approximate and may not always appear to align with image on map.
Brumalia Tholus
-6.31° N 64.99° E