The island belongs to northern city of Hai Phong. It has a wide variety of natural ecosystems, both marine and terrestrial, and is highly biodiverse.

The different natural habitats found on Cat Ba Archipelago include limestone karsts, tropical limestone forests, coral reefs, mangrove and sea grass beds, lagoons, beaches, caves and willow swamp forests.
"For those that are tempted to be in the water but have no desire to swim or surf – then perhaps grabbing a canoe and kayaking down a river would be a great idea to keep fit,"

How the Hanoi communist flirts with the local capitalism after the US war time completed?

Close your eyes in the streets of Hanoi’s Old Quarter and you’ll experience two sensations. The first is the earsplitting cacophony of conversation, cars, clamor and chaos. The second is the realization that closing your eyes for very long in such a crowded place can be unwise, unless you enjoy being jostled, bumped, hustled, shouted at or maybe even knocked down.