Through the two-day and one-night tour, visitors travel through the forest and explore Sinh Ton (Survival) Valley, E cave and Thuy Cung (Aquarium palace) Cave while crossing through the 6-kilometre Toi Cave. Photo: VNA 
The tour begins with the exploration of E Cave, located deep in the park’s thick forest and covered by a unique stalactite system. Photo: VNA 
The next stop is Sinh Ton Valley, which is well-known for its century-old trees and unique flora and fauna such as flowers, mushroom, monkeys and multi-coloured butterflies. Photo: VNA 
Arriving at Thuy Cung Cave – the back gate of Toi Cave – visitors set up tents, have dinner, rest and experience an exciting night in the forest with games and art performances. Photo: VNA 
Inside the cave is a long golden sand strip. Photo: VNA 
Discovered in 1990, Hang Toi has a primitive beauty with thousands of spectacular stalagmite and stalactites. 
Tourists can reach Hang Toi by a 400m zip-line from an observation deck. Photo: VNA 
The cave was formed about 5 million years ago with stunning beauty. Photo: VNA 
The 5,558m long and 80m high Hang Toi is a shelter of many species of animals like bat and swift. Photo: VNA VNA
