Dark & Bright Cave, the unique cave in Lan Ha Bay

Visitors to Halong Bay often hear about famous caves such as Sung Sot (Surprise Cave), Luon (Tunnel Cave), and Thien Cung (Heaven Palace Cave), which are very beautiful but quite crowded with tourists in recent times. But suppose you go further, to a more quiet area (for example, just 2 kilometers from the Surprise Cave).

In that case, you will find two extraordinary caves where limestone mountains meet the sea to create a unique combination of nature: Bright and Dark Caves. This area lies on the border of Halong Bay, Bai Tu Long Bay and Lan Ha Bay, near Cat Ba National Park. Formed by an enclosed group of islets, these caves connect with the sea via a 4-meter-wide, 100-meter-long, and 3-meter-high mouth.

Visit the Bright cave is one of the excited experiences when cruising Lan Ha Bay 

Bright cave in Lan Ha Bay

Although not as famous as Halong Bay, and with perhaps fewer specially shaped rock formations, Lan Ha Bay, with its Dark & Bright Cave, earns its place as a particular piece of the World Heritage site which it is part of. We think it is undoubtedly one of the best places for kayaking, swimming or photography. Cruising to Bright part of the cave, you will see an angled passageway opening the cave at water level. Inside the lovely passage is a serene round lake surrounded by lush trees and steep stone cliffs, reminiscent of a stadium surrounded by a high platform.

Bamboo boat to Bright cave

Bamboo boat to Bright cave (Source: Flickr)

Going around the lake, you might imagine being in a colorful garden with the Benjamin fig trees and various sweet-scented orchids spreading their blooms, close enough to touch. Not being surrounded by islets like Bright Cave, Dark Cave is long and dark, like a tunnel.

Because it is very dark inside (hence its name), anyone going through it needs a torch to light the way. Unlike Bright Cave, which is always available for visiting, Dark Cave can be engulfed by the tide when the moon is high, so it is not usually listed in cruise itineraries.