During the War of the Pacific, Morro Solar was the scene of one of the bloodiest battles, the Battle of San Juan and Chorrillos. Historical remains of uniforms and weapons have been found here and several forts were built in the vicinity. There are now monuments to the fighters; prominent among them is the "Monument to the Unknown Soldier". The new wild potato species, "S. neoweberbaueri", collected by Augusto Weberbauer on Morro Solar, was named by Ludwig Wittmack in 1914.