A walking tour is one of the best ways to get your bearings in Cartagena's old city. Expect 2–3 hours of fairly easy strolling through narrow streets, stopping at plazas, colonial houses, and city walls. Good guides mix history with street-level observations about daily life, architecture quirks, and how the city has changed. You'll cover the main historic center (Centro Histórico) and sometimes Getsemaní. It's not particularly strenuous but you'll be on your feet in heat and humidity, so wear comfortable shoes and bring water. The experience is mostly outdoors with some shaded stops; you'll see a lot more than you would wandering alone.
The best time is December to March when it's drier and slightly cooler. Avoid walking tours between 11am and 3pm year-round—the sun is brutal. Shoulder months (April, November) are still decent if you start early. Expect to pay around $35–70 per person for a small-group tour; private tours usually run $120–200 total for up to four people. Street food or a cold drink afterward is a nice way to finish.
Pick an early-morning tour if you want photos without crowds and bearable heat. Skip the ones that promise to visit ten different churches in three hours; they're rushed and you'll retain nothing. If you're short on time or hate group dynamics, spend the money on a private guide instead of a big bus-style walk.
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