If your trip to Cartagena is all booked but your itinerary is looking a little empty, let us give you a helping hand.Think of Cartagena and then say the first thing that leaps to mind. You probably said "Puerta del Reloj," right? Being such a well-known landmark, you just can't miss it. Hurl your bags into the car and tick it off your bucket list.If your family and friends ask why you're heading here, just show them some pictures of San Pedro Claver Church and Convent and Jaime Moron Stadium. These fantastic attractions will make sure you have an awesome trip.Not far from the heart of the city, Clock Tower is one sight you might like to consider putting on your to-do list. If you still have room on that travel schedule, Bocagrande Beach and Marbella Beach will keep you occupied too.