Located to the south of Halong Bay, Lan Ha Bay is by far the smallest of the three primary bays in the area (with Bai Tu Long Bay, another quiet beauty, completing the trio). It comprises around 400 limestone islets spread over 76 km2, and is just as pleasing to the eye as Halong Bay. Lan Ha Bay features the same jaw-dropping landscape of towering karst outcrops that tourists typically associate with Ha Long and if it weren’t for the conspicuous absence of crowds in Lan Ha, you probably wouldn’t be able to tell the difference between the two bays.