Well, I am from British Columbia and the Columbia river is a famous American river in the west of the country so it is a common enough error for north americans to make. Those that have never been to Colombia and only have visions of leftist guerrillas would be amazed at the country. Medellin has a metro system that works extremly well and is cheap. Shopping is incredible and you can buy a decent steak in numerous places if beef is a big deal to you.