One such interesting structure is the Son Bhandar caves found at Rajgir in Bihar. The town of Rajgir is host to many events that are considered to be important in the history of the country. Buddha is said to have given sermons to Bimbisara, the King of the Magadha empire, at Rajgir.
The Son Bhandar caves are two rock cut caves that are located at the foot of the Vaibhar Hills. The caves were hollowed in the cliff of the hill during the 3rd and 4th century AD. Inscriptions found inside one of the caves narrates that the caves were constructed by the Jain saint Muni Vairadevi as an abode for the Jain ascetics during that time.
Son Bhandar in translation means the store of gold and a legend goes saying that there is treasure hidden in its walls. The cave is carved out to be a guard, which has a rectangular chamber, a vaulted ceiling that stands on the vertical wall which rises to a height of 1.5 m. This feature is found in the older Mauryan rock cut structures.
Going by the legends, the cave is said to have a passage, which would take you to a treasury of gold, although the entrance to this cave is hidden in such a manner that it still remains a mystery. The passage is said to be going through the Vaibhagiri mountain and would reach the Saptapami caves on the opposite side of the mountain ranges. Some believe that this treasure belongs to Jarasandha, while a few say it belongs to Bimbisara.
Going by Bimbisara’s legend, it is said that when his son Ajatashatru restricted his father from the powers of a royal, his mother is said to have secretly hidden some wealth, which was later donated to a Tirthankara.