Cast Iron plate - Municipalidad de Turrialba (Costa Rica)
Probably an access cover to a municipal water shut-off valve.
Photos by Tristan Savatier
Photos from Costa Rica (Central America)
Check this too:
Puerto Limon's Train Depot A semi-abandoned train yard in Costa Rica
Equipment used: Sony DSC F828 (8 Mega-pixel) with 4GB Microdrive.