Tayrona National Natural Park occupies 150 square kilometres of Caribbean coastline where the Sierra Nevada de Santa Marta descends into turquoise water. Declared a protected area in 1964, the park shelters 108 mammal species, 300 bird species, and coral formations that fringe granite boulders older than the Andes. The Tairona civilisation inhabited these forests and beaches for more than a millennium before Spanish contact, leaving terraced stone platforms and ceremonial sites beneath the canopy. Cabo San Juan del Guía, the park's most photographed beach, lies five kilometres inland from the nearest vehicle access point, reachable only by foot or by sea. A tayrona boat tour from santa marta departs from the city's fishing harbour and follows the coast northeast, passing Taganga's red-tiled roofs and the cliffs of Bahía Concha. Most sailing expeditions anchor at Playa Cristal, where visibility reaches fifteen metres over elkhorn coral gardens, or continue to Cabo San Juan, cutting a two-hour jungle trek to twenty minutes at sea. The park's eastern boundary ends at the mouth of the Piedras River, where freshwater mingles with salt and mangroves frame the Sierra's snowcapped peaks. Operators navigate shallow draft vessels close to shore, threading between submerged rocks that appear as dark shadows beneath the hull. Tayrona's marine zone extends 300 metres offshore, protecting reef ecosystems that support parrotfish, sergeant majors, and green sea turtles. The park closes annually in February for ecological rest, a policy enforced since 2013 to reduce trail erosion and allow wildlife breeding cycles to proceed undisturbed. Sailing routes remain accessible year-round outside closure periods, though swells increase between November and January when trade winds strengthen. The 96,500 COP conservation fee funds ranger patrols, waste removal, and replanting programmes along degraded sections of the coastal trail. Santa Marta, founded in 1525, serves as the gateway to Tayrona and the oldest surviving Spanish city in Colombia. The park's western entrance at El Zaino lies 34 kilometres from the city centre, a one-hour drive along a road that climbs through dry forest and banana plantations before descending to the park gate. Boat access eliminates this approach entirely, delivering passengers directly to beaches that inland trekkers reach only after hours under the canopy. Captains familiar with the coast time departures to the tide, departing early to secure calm water and return before afternoon wind chop builds along the exposed headlands.