Viking Altar Rock facts for kids
The boulder was found in 1943 and is roughly 8.2 m (27 ft) long by 5.2 m (17 ft) wide. It has four roughly triangular holes about 1 meter above the base. The rock is promoted as an attraction as part of a "Trail of the Vikings" featuring supposed evidence of Viking exploration of Minnesota. This is however conjecture.
Viking Altar Rock Facts for Kids. Kiddle Encyclopedia.