Cat Ba Island

One of Vietnam's major centers for activities and adventure travel attractions, Cat Ba Island sits on the western edge of Halong Bay.

This is the best place to visit if you want to organize cruises and kayaking trips in Lan Ha Bay, which lies off Cat Ba's southern coast. Lan Ha Bay is a less visited seascape of karst islets and outcrops that makes for a quieter alternative to Halong Bay.

Off the water, much of Cat Ba's dense jungle interior is part of Cat Ba National Park, where hikers can spot plentiful birdlife, as well as animals such as macaques.

For many visitors, though, Cat Ba is all about climbing opportunities. Climbing excursions here utilize both the island's limestone cliffs and Lan Ha Bay's outcrops, providing experiences to suit both complete climbing beginners and experienced climbers.