It is located about 1 km north of the Sri Venkateswara Temple. Chakra teertham is also near to this rock, which people want to visit.
About the Rock
Silathoranam is a natural rock formation with immense archaeological significance. It has religious importance too. Arch is also called Silathoranam in local language
(Telugu: “Sila” means ‘rock’ and “thoranam” means a garland strung connecting two vertical columns or an ‘arch’ as in this case).
Only one in Asia
The arch measures 8 m (26.2 ft) in width and 3 m (9.8 ft) in height, and the Geologists have identified the rocks on the hill as pre-Cambrian.
This arch formation suggests an antiquity of several million years to the Tirumala hill. Reputed as the only one of its kind in Asia, it is believed to be several million years old.
It is said that there are only two other sites like this in the entire world itself.
The other two are the one that cuts through the headland of the Dalradian Quartzite in Ukand and the Rainbow Arch Bridge of Utah in USA.
Since the rock look likes and appears to be the hood of a serpent, a conch and a discus, it is conceived that this source is dedicated to Lord Venkateshwara idol.