It's not really the jungle, just a canoe ride through the mongroves. Here is the description:
Mangroves, Show and Lunch
Wind your way through a lush landscape of mangroves during a canoe tour of Cienaga De la Virgen and withdraw to Las Americas Resort where a hearty lunch and a folklore show awaits.
Sit back and surrender to the sprawling natural splendor of Cartagena as you embark on a 30-minute, air-conditioned motor coach drive past a spectacular seaside panorama of sand and surf to the beachside, Caribbean-inspired Las Americas Hotel and Resort. During your scenic trip, discover the fascinating history of the region from your friendly guide, and marvel at the breathtaking views that surround you at every turn. Upon your arrival, board your canoe and then embark on a remarkable guided adventure amidst the calm mangroves and still swamp waters of the Cienaga De la Virgen, considered to be the most important eco-system in Cartagena.
During your expedition amidst the unspoiled surroundings of Cienaga De la Virgen, lose yourself to the serenity of the calm water and secluded coastline as your guide paddles you through a number of shady mangrove tunnels. Revel in the natural beauty as you breathe in the sweet fragrances and marvel at the fantastic foliage that surrounds you everywhere you look. Glide around cool canopied bends as the warm tropical breezes wash over in every direction, and learn about the spectacular flora and fauna some exclusively indigenous to this region from your guide. Watch for birds as they soar high and then dive in the sky, and gaze down to the still water beneath you to spy a curious crustacean or colorful fish.
After your hour-long journey, return to Las Americas Hotel and Resort, where you are invited to savor the flavor of a refreshing beverage and a hearty buffet-style lunch, and enjoy the day as you so desire. Sunbathe on a warm sandy beach and drift off to the soothing sounds of the breaking waves or make a splash in one of three resort pools. Then, enjoy a traditional folklore show celebrating the history and culture of Cartagena in song and dance. Finally, after your near three-and-a-half hour resort visit, gaze upon the picturesque sights once more as you begin your 30-minute return trip passing through the historic walled city back to the ship.