One of central Athens' best preserved ruins is the Temple of Hephaestus. Nestled within Ancient Agora, this site was built between 460 and 420 B.C. and once served as a Christian church.
To reach level one friendship with Hephaestus, you'll need to take the Un-hammer from him and repair the broken down wind turbines around the island. You won't be able to reach all of them for now ...