Of course, the Big island, full of exceptional sites spelunking. Caves accessible "to the public".
The most famous are in The Massif of Ankarana. The Massif of Ankarana is “Swiss cheese” with a network of underground rivers like the Manjeba, which runs through the massif. 11 main caves (some of which are sacred). On the downside there in large numbers, especially in Anjohibe Boeny, are the subject of a full tour with bivouac.
South-west from the town of Antsirabe, Ibity’s landscape consists of crumbled blocks and jagged cliffs. Erosion has carved the area over the last 60 million years, shaping the “Giant pots”. The sinkhole of the “du Diplodocus”, “de la Jument”, “du Caniche” and “du Perroquet” are some of the caves discovered since 1960. This region is not well known but is full of underground promises!
In Andranobe (North of Majunga), the underground network spreads over 2 km. The concretion ranges from fine needles to 2-meter diameter pillars. The chambers are huge, with vaults rising up to 10m to 15m. Following the river upstream leads to the open air, in a natural pool surrounded by lush vegetation.
BEGINNING SPELUNKERS SHOULD NEVER VENTURE INTO MADAGASCAR’S CAVES WITHOUT AN EXPERIENCED GUIDE. THE COUNTRY’S LONGEST MEASURED CAVE STRETCHES FOR 17 KM, WHILE THE DEEPEST PLUNGES MORE THAN 200M BELOW THE SURFACE, RENDERING CONDITIONS PERILOUS FOR ANYONE WITHOUT PROPER TRAINING AND EQUIPMENT.