Why all Avatar's and Grantha's references happened only in India and not elsewhere?

Question

This is more merely an outside question. Many have a conscious feeling that why all Devas, Avataras and incidents written on our text books are confined to Indian Mediterranean, mostly North region of India?

The spread through mapping seems to start from Afghanistan (Gandhar) and ending to Uttar Pradesh (Indian state), as what there current names.

If I take a look at the mapping, the most conscious is Shiva, who resided in Himalayas (Peculiarly), but there being thousands of mountains around the world.

Similarly Rama took avatar in Ayodhya which is the northern part of India, but not in any other country.

Even most of the mythological history seems to revolve around Northern Part of India only, leaving Ramayana which includes Sri Lanka as a core part.

Answer 1

There are many references which point towards places outside India. But the names are contemporary to puranas so the names are obviously in Sanskrit.

In Vaaman Purana, it is said that Vaaman or Vishnu placed a Trident on a mountain to define the boundary of east direction. (It is also repeated in Kishkindha Kand of Ramayana). This trident is Paracas Candelabra of Peru. The patal to which Bali goes is claimed as South America by P N Oak. Kalyavan from Mahabharata is also claimed by Shivaji Sawant in his book to be Yavan (Ionian or Greek).

We need to find such unexplained places outside India also. (For e.g. Places from Patal like Bhogawati, Tribhuvanak Nagariust be searched in South America. They are claimed by P N Oak and Anil Patil as Bogota and Tiahuanaco)

Now, before and after Ravana, India has been a superpower in the world. Main goal of Ramayana was to establish Ayodhya's supremacy over powerful Lankan empire. As victory is written by the victor, we can see heroes from India and villains from other countries - Ravan, Kalyavan, etc.