Go three doors down from Casa De Pestagua, and find the best homemade pasta everrrrrr - it is not on google maps, just follow your nose (blue sign out front)
Amazinggggg food! Top restaurant in Latin America with a rotating menu that will not disappoint, especially since the make insane dishes from beautiful flowers. Probably the nicest restaurant in Cartagena and the only place you will need a reservation. https://www.theworlds50best.com/latinamerica/en/the-list/celele.html
This is an amazing beach club accessible by boat about 10 mins off the coast of Cartagena. You can stay over night or just for the day to enjoy beach club during the day. You can sign up directly on the website!
Underneath Caffe Lunatico - super small spot for great craft beer!
Right off the square in gestemini, this place has great tapas and of course... great drinks :)
Can't go wrong with a pizza, this one has solid pies and inviting open air spaces.