Prior to the introduction of the steamboat on the Magdalena River during the 1820s, reaching Bogotá from the Caribbean coast required a two to five month journey. This trip included travelling in bongos (rafts) and traversing mountains on the backs of both men and beasts. Bogotá was the most isolated of all the Spanish viceregal capitals. No other viceroyalty was so dependent on river transportation as New Granada (now Colombia). Even by the late nineteenth century, travel within the country remained dreadfully difficult. In the best of weather most Colombian roads were barely suitable for mule traffic, and, whenever tropical rains poured, human carriers undertook the burden of transportation despite the fact that Colombia, following the newest American and European trends in transport innovations, built railroads to the point where they were the nation's leading technological import during the nineteenth century. The apparent futility of this modernization effort has led many scholars, both Colombians and non-Colombians, to conclude that Colombia moved directly from the age of the mule to that of the airplane.