The Largest Engineering And Archaeological in Europe: Athens Subway

The Athens Metro  is a rapid-transit system in Greece which offers the Athens urban sprawl as well as parts of East Attica. It incorporates the previous Athens-Piraeus Electric Railways (ISAP), which opened as a traditional vapor train in 1869, and which was electrified in 1904 and is now part of Line 1. Starting in 1991, Attiko Metro constructed and also extended Lines 2 and 3 and the Attiko Metro Operations Company (AMEL) operated these lines from 2000 to 2011. The metro network merged in 2011 when the Greek government created the Urban Rail Transport Company (STASY), a subsidiary of the Athens Urban Transport Organization (OASA).