After God revealed His Son to him, where did Paul go before returning to Damascus?

Answer: Arabia

Paul says he did not go up to the apostles in Jerusalem but went into Arabia and later returned to Damascus.

“to reveal His Son in me so that I might preach Him among the Gentiles, I did not rush to consult with flesh and blood, nor did I go up to Jerusalem to the apostles who came before me, but I went into Arabia and later returned to Damascus.”— Galatians 1:16-17 (BSB)