While seasoned travellers may venture into Cartagena's gritty Bazurto Market on their own, those not yet toughened by locals-only markets of the region may prefer to explore as part of a guided tour. This sprawling market, where trade starts before the crack of dawn, features incredibly fresh produce and seafood from Cartagena and beyond. Much of it makes its way to the tables of local fine dining establishments within the space of the same day. There is plenty to look at and taste, including local street food and multiple succulent varieties of tropical fruit you're unlikely to have encountered before.

At the foot of the Atomium, Mini-Europe allows you to have a whistle-stop tour around Europe in a few short hours.

Museo del Oro Zenú is Cartagena's response to the famous gold museum in Bogotá. Here you'll learn about the culture of the Zenú people through the artefacts of their tribe: over 600 gold, silver and ceramic pieces are on display. Other highlights include displays on body painting and textiles, and an exhibit focusing on the engineering prowess of the Zenú — learn how they built a vast network of canals over 2,500 years ago.

Just an hour's boat trip away from Cartagena lie the magnificent Rosario Islands, which belong to Colombia's only underwater natural park (Rosario and San Bernardo Corals National Natural Park). Abundant marine wildlife (including over 50 species of corals) and some of Colombia's best beaches draw in many in search of relaxation and active pursuits such as snorkelling and diving. Isla Grande is best for kayaking through unique mangrove forests and seeing the phosphorescent plankton light up the waters of a brackish lake at night, while Playa Blanca is Cartagena's most spectacular white-sand beach (also reachable by land). It should be said that the company you choose to tour with has the potential to make or break the experience. Low cost tours can mean multiple intermediate stops en route to your destination, as well as unpleasant surprises such as no transfer back to your hotel. Try and choose a trusted company with consistently good reviews, or opt for a private tour. Mind that seas may be rough at certain times of the year, particularly in December and January, when tours on smaller boats may even become dangerous.