From Camellon de los Martires you pass through the historical city gate ”’Puerto del Reloj”’, the gate of the clock, onto the triangular square ”’Plaza de los Coches”’, the place of the carriages. Once this was one of the largest slave markets in all of Latin America, a major source of wealth to the city, aside of the gold export to Spain. Nowadays a statue of Pedro de Heredia, the founder of the city, stands on this square.