Tell about Tirupati Balaji ?

This is referred to as Eparchaean Unconformity. This Unconformity separates the Proterozoic Nagari Quartazite and Archean granite representing a time gap of 800 Ma.

In 2001, the Geological Survey of India(GSI) declared the Eparchaean Unconfirmity to be one of the 26 "Geological Monuments of India".

Natural Arch in the Tirumala Hills is a distinctive geological wonder located 1 km (0.6 mi) North of the temple, near the Chakra Teertham. The Arch is also called Silathoranam in Telugu (“Sila” means ‘rock’ and “thoranam” means a garland strung over a threshold, connecting two vertical columns or an ‘arch’ as in this case)

The arch measures 8 m (26.2 ft) in width and 3 m (9.8 ft) in height, and is naturally formed in the quartzites of Cudappah due to natural erosive forces.

IT IS RENOWNED FOR ITS EXOTIC DRAVIDIAN ARCHITECTURE.
Primarily because its temples have pyramid shaped towers and are constructed of sandstone, soapstone and granite.

THIS PLACE IS KNOWN FOR ITS AMAZING LITERACY RATE (87.55%).
What’s even more remarkable is that this is significantly higher than the national average of 73%.Source

THE TOWN IS AN ESTABLISHED CENTER OF ‘VAISHNAVISM’
Around 5th century A.D. was the period during which it was praised by the Alwars.

THE TOWN IS A PART OF THE LEGENDARY ‘RAMAYANA’ TEXT.
According to Varaha Purana, during Treta Yugam, Lord Sri Rama resided here along with Sita Devi and Lakshmana on his return from Lankapuri.

IT IS A RECOGNIZED TOURISM CENTER IN THE COUNTRY.
It was awarded the title of “Best Heritage Site” by the Ministry Of Tourism in the year 2012-2013.

ITS HISTORY IS GLORIFIED BY THE RESIDENCE OF VARIOUS KINGDOMS.
The Pallava Kingdom around 9th Century, the Chola Kingdom around 10th Century and the Vijayanagara Empire around 14th century stand testimony to this fact.

SRI TALLAPAKA ANNAMACHARYA (ANDHRA PADA KAVITA PITAMAHA) IS SAID TO HAVE SUNG MANY SONGS IN PRAISE OF THIS HOLY TOWN.
He compared it to be divine; including the rocks, streams, trees, animals, and added that it is heaven on earth.

IT HAS THE SECOND LARGEST ZOO IN ASIA.
Sri Venkateswara Zoological Park covers an area of 5,532 acres (22 square kilometers). It is said to have been built on the concepts of the Hindu Mythology, and is home to some of the animals that exist in ancient texts like Ramayana and Mahabharata.

THE FLORA OF TIRUPATI IS UNDOUBTEDLY RARE.
With about 1,500 vascular plant species belonging to 174 families, some of the rarest and most endemic plant species like Red Sanders and Cycas Beddomei (only found here!) are found here.

THE LOCAL NATIONAL PARK IS HOME TO SOME RARE BIRDS AND ANIMALS, AND HAS WON ACCOLADES FROM SEVERAL BIO RESERVES.
About 178 species of birds have been identified here, which also includes the globally threatened “Yellow-throated bulbul”, the critically dangered “Oriental white-backed vulture”, Loten’s Sunbird etc.

IT IS THE HOME GROUND OF ONE OF THE WORLD’S RICHEST TEMPLE ADMINISTRATIONS, TTD (TIRUMALA TIRUPATI DEVASTHANAM).
The major source of its income is Kanuka or Hundi offerings.
Besides this, the sale of prasadam, darshan tickets, sale of seva tickets, sale of human hair, and receipts from choultries (places of accommodation) are the other significant sources of income.

AND THE SECRET VILLAGE 22 KM FROM THE TOWN! WOW.
Allows only the residents of that village to enter; and what’s more – it is said that the village has a garden of flowers from where the flowers are fetched and used in the sanctum of Lord Venkateswara Swamy.

THIS ULTRA COOL RELIGIOUS HUB HAS FREE TRANSPORT AT ITS FEET.
The free bus services operated by TTD in Tirumala are known as “Dharma Radhams”. There are 12 such buses that pass through cottages, choultries, temples and other places in Tirumala, at a frequency of every 3 minutes in the prescribed time slots.

TALK OF NATURE’S WONDERS, AND YOU HAVE GARUDA HILL.
The Garuda Hill in Tirumala, the abode of Lord Venkateswara, features a natural rock formation that is in the form of Garuda (the eagle).
Incidentally, it turns out that Garuda is also the vehicle of Lord Venkateswar

THE EVER-FAMOUS 300-YEAR OLD “TIRUPATI LADDU” HAS A GLOBAL PATENT, FOLKS!
It got the patent rights under the Geographical Indications of Goods (Registration and Protection) Act; to counter the black market that was developing.
Around 150,000 laddus are made daily. Each laddu weighs around 100gms, and is said to be made by a group of priests called “Archakas” in a special temple kitchen called “poku”.

The ambulance, a specially outfitted truck costing Rs. 13 lakh, has been funded by the Animal Welfare Board of India and the Marchig Animal Welfare Trust of Scotland. It uses a hydraulic system to haul animals into its stalls and can also be used for shifting stray dogs.

THE MOST-VISITED PLACE OF WORSHIP IN THE WORLD.
Visited by about 50,000 to 100,000 pilgrims daily; while on special occasions and festivals like the annual Brahmotsavam, the number of pilgrims shoots up to 500,000 and more, making it the most-visited holy place in the world.

HOME TO “SRI VENKATESWARA TEMPLE”, ONE OF THE WORLD’S RICHEST AND FAMOUS VAISHNAVITE TEMPLES DEDICATED TO LORD VENKATESWARA.
With the tag of being India’s richest temple (after the Sree Padmanabhaswamy Temple in Thiruvananthapuram, Kerala) of any faith, it is believed to have been around since 300 BC.

THE CITY OF MIRACLES, IT IS!
Needless to mention, the lights lit in front of the Swamy are said to be lit since thousands of years.

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The Tirumala ranges show the face of Lord Balaji.