 The town that immediately sprang up to accommodate the railroad offices, warehouses, docks, and shops and to lodge both railroad workers and passengers soon became, and remains, the second largest in the country.United States citizens named it Aspinwall, after one of the founders of the Panama Railroad Company, but the Panamanians christened it Colón, in honor of Columbus.Both names were used for many years, but because the Panamanians insisted that no such place as Aspinwall existed and refused to deliver mail so addressed, the name Colón prevailed.