 The ten colossal heads from San Lorenzo originally formed two roughly parallel lines running north @-@ south across the site . Although some were recovered from ravines , they were found close to their original placements and had been buried by local erosion . These heads , together with a number of monumental stone thrones , probably formed a processional route across the site , powerfully displaying its dynastic history . Two of the San Lorenzo heads had been re @-@ carved from older thrones . 
 The ten colossal heads from San Lorenzo originally formed two roughly parallel lines running north @-@ south across the site . Although some <a href='uninflect' title='1'><mark>were</mark></a> recovered from ravines , they <a href='uninflect' title='2'><mark>were</mark></a> found close to their original placements and <a href='been_done' title='3'><mark>had</mark></a> been buried by local erosion . These heads , together with a number of monumental stone thrones , probably formed a processional route across the site , powerfully displaying its dynastic history . Two of the San Lorenzo heads had been re @-@ carved from older thrones . 
The ten colossal heads from San Lorenzo originally formed 2 roughly parallel lines running north @-@ south across the site . Although some was recovered from ravines , they was found close to their original placements and done been buried by local erosion . These heads , together with a number of monumental stone thrones , probably formed a processional route across the site , powerfully displaying its dynastic history . Tw2f the San Lorenzo heads had been re @-@ carved from older thrones .