General Méndez Vigo Bridge

The General Méndez Vigo Bridge is a brick barrel vault bridge that brings what is now Puerto Rico Highway 14 across the Río Las Minas near Coamo, Puerto Rico. Also known as Bridge #173 and as Puente Rio las Minas, it was built in the year 1862 as part of Puerto Rico's Carretera Central. The bridge is historically significant for its association with the U.S.

Source: Wikipedia