Castillo de San Marcos - 1
San Carlos Bastion/Shot Furnace
Castillo de San Marcos National Monument
St. Augustine, Florida
The oldest masonry fort and 21st oldest man made structure in the Continental United States the construction of Castillo de San Marcos began in 1672 and was completed in 1695. Considered to be the best preserved example of a Spanish colonial fortification the United States the fort sits along the waterfront near the downtown of the nations oldest surviving European settlement St. Augustine.
In the foreground is the Shot Furnace a structure made by the U.S. Army in the 1840s to heat cannonballs until red hot to be used to shoot at wooden ships to catch them on fire.