Cartagena is an unmissable place to visit and Colombia's most popular city for tourists, thanks not only to the colonial buildings and horse-drawn carriages in the "Walled City", but also to the sandy beaches, mouth-watering cuisine, and raucous nightlife.   In spite of the stereotypes which people harbour about the country, the vast majority of Colombians are unwaveringly welcoming to foreigners and go out of their way to make people feel at ease.