In 1851, surveyors placed a marble obelisk on a mesa overlooking the Pacific Ocean, which demarcated the United States-Mexico boundary line. Tourists flocked to

In 1851, surveyors placed a marble obelisk on a mesa overlooking the Pacific Ocean, which demarcated the United StatesMexico boundary line. Tourists flocked to

The Tijuana River Valley Historical Ecology Investigation synthesizes hundreds of historical maps, photographs, and texts to reconstruct the ecological, hydrolo