Balcones in the old city, Cartagena / Photo: Elena Jaramillo.
Dress
Take Light, comfortable clothing for hot weather. On a hot day, the temperature may reach 32º C (89º F).
Take sports shoes for guided tours of the historic center
You can buy or rent special water-sports equipment. Consult your hotel or go to a specialized shop.
Take a thin jumper in case the temperature drops suddenly or the airconditioning is too cold for you (e.g. airport, convention center, restaurants etc).
Health
Taken analgesics and anti-histamines in case of headaches or over-exposure to the sun or insect bites.
Make sure you take plenty of liquids during walks through the streets.
Have a yellow-fever vaccination a week before traveling.
General
Always use a sun-blocker.
Apply insect repellent.
Some hotels in the walled city have bicycles for guests to hire and ride around the historic center. The service is usually free. Ask at the hotel reception.
For a ride in a horse-drawn carriage, ask as a hotel or at a carriage-station - there are several in the historic center. The service is available by day or night inside and outside the old city.
Always use certified guides for your trips. The hotel reception desk will give reliable information about them.