Acts 18:1

Athens : a town which was the capital of Attica in Greece
(37° 59´, 23° 44´)

Corinth : a town located on the narrow isthmus connecting the Greek mainland with the Peloponnesus Peninsula to the south
(37° 54´, 22° 52´)

Acts 19:1

Apollos : a Jewish man from Alexandria who was taught by Aquila and Priscilla

Corinth : a town located on the narrow isthmus connecting the Greek mainland with the Peloponnesus Peninsula to the south
(37° 54´, 22° 52´)

Ephesus : a town in western Asia Minor at the mouth of the Cayster River
(37° 57´, 27° 22´)

Paul : a man from Tarsus who persecuted the church but became a missionary and writer of 13 Epistles