In a remote area of Congo, Africa's most active volcano is putting on the biggest display in over a century.
Though scientists have set up a safety zone around the volcano, Virunga National Park is inviting tourists on an overnight trek to view a spectacular eruption of Mount Nyamulagira.
Rivers of lava are flowing slowly north into an uninhabited part of the park.
For more information: Tourists invited to see erupting Congo volcano
Cai Tjeenk Willink / AP
A park ranger stands guard as Mount Nyamulagira erupts in eastern Congo on Friday, Nov. 11.