I originally logged this when it was a locationless cache.
From Wikipedia:
Corinth is a Greek city-state, on the Isthmus of Corinth, the narrow stretch of land that joins the Peloponnesus to the mainland of Greece. To the west of the isthmus lies the Gulf of Corinth, to the east lies the Saronic Gulf. Corinth is about 48 miles (78 km) southwest of Athens. The isthmus, which was in ancient times traversed by hauling ships over the rocky ridge on sledges, is now cut by a canal.
Corinth is also the capital of the prefecture of Corinthia. The city is (clockwise) surrounded by the coastal townlets of Lechaio, Isthmia, Kechries, and the inland townlets of Examilia and Ancient Corinth right next to the archaeological site. Geophysically the city is likewise surrounded by the narrow coastal plain of Vocha, Corinthian Gulf, Corinth Canal, Saronic Gulf, Oneia mountains, and the monolithic rock of Acrocorinth where the medieval acropolis was built.
When the apostle Paul first visited the city (AD 51 or 52), Gallio, the brother of Seneca, was proconsul. Paul resided here for eighteen months (see Acts 18:1-18). Here he first became acquainted with Aquila and Priscilla, and soon after his departure Apollos came from Ephesus. Although he intended to pass through Corinth the second time before he visited Macedonia, circumstances were such, in the absence of Titus, that he went from Troas to Macedonia, and then likely passed into Corinth for a "second benefit" (see 2 Corinthians 1:15), and remained for three months, according to Acts 20:3.
During this second visit in the spring of 58 it is likely the Epistle to the Romans was written. Paul's First Epistle to the Corinthians reflects the difficulties of maintaining a Christian community in such a cosmopolitan city.