For a green travel experience in Vietnam, consider visiting Ba Vi National Park near Hanoi, or Cat Ba Island with its blend of terrestrial and marine ecosystems. Other excellent options include Phong Nha-Ke Bang National Park , known for its caves and forests, and Sapa , famous for its terraced rice fields Ba Vi National Park: Located near Hanoi, this park offers a refreshing escape with its mountains, forests, and diverse flora. Walking among the trees and enjoying the fresh air is a highlight. Cat Ba Island : A UNESCO Biosphere Reserve, Cat Ba offers a mix of stunning limestone karsts, lush forests, and vibrant coral reefs. It's a great destination for hiking, kayaking, and exploring the diverse ecosystems. Phong Nha-Ke Bang National Park: Famous for its spectacular caves, including Son Doong , the world's largest cave, this park also features vast forests and underground rivers. It's a haven for na...