Puerto Princesa sits between two very different worlds, inland limestone mountains hiding the Underground River, a navigable cave system running eight kilometers beneath the rock and ranked among the New7Wonders of Nature, explored by boat past stalactites and monitor lizards watching from the forest above the entrance. Sabang, the river's gateway, offers its own detours, from a calm mangrove paddle to a more physical climb and rappel through the limestone caves at Ugong Rock. Closer to the city, Honda Bay scatters small islands good for a half day of swimming and snorkeling, while Puerto Princesa itself, often called the cleanest and greenest city in the Philippines, adds a baywalk, a strong local food scene, and nearby pearl farms producing Palawan's signature golden south sea pearls. Few ports offer this much range in one call, ancient geology, open water, and everyday city life, all within reach of the ship.