The tract of land south of the Himalaya Mountains is the land of India, which was known as Bhārata-varṣa. When a living entity takes birth in Bhārata-varṣa he is considered to be most fortunate. Indeed, Caitanya Mahāprabhu has stated:

bhārata-bhūmite haila manuṣya-janma yāra
janma sārthaka kari' kara para-upakāra
(CC.1:9:41)
Thus whoever takes birth in the land of Bhārata-varṣa attains all the facilities of life. He may take advantage of all these facilities for both material and spiritual advancement and thus make his life successful. After attaining the goal of life, one may distribute his knowledge and experience all over the world for humanitarian purposes. In other words, one who takes birth in the land of Bhārata-varṣa by virtue of his past pious activities gets full facility to develop the human form of life. In India, the climatic condition is such that one can live very peacefully without being disturbed by material conditions. Indeed, during the time of Mahārāja Yudhiṣṭhira or Lord Rāmacandra, people were free from all anxieties. There was not even extreme cold or extreme heat. The three kinds of miserable conditions-adhyātmika, adhibhautika and adhidaivika (miseries inflicted by the body and mind itself, those inflicted by other living entities, and natural disturbances)—were all absent during the reign of Lord Rāmacandra or Mahārāja Yudhiṣṭhira. But at present, compared to other countries on earth, India is artificially disturbed. Despite these material disturbances, however, the country's culture is such that one can easily attain the goal of life—namely salvation, or liberation from material bondage. Thus in order to take birth in India one must have performed many pious activities in a past life.

(Srimad Bhagavatam------4:25:13-------purport).

These facts are further explained in Caitanya-caritāmṛta (CC.1:9:41):
bhārata-bhūmite haila manuṣya-janma yāra
janma sārthaka kari' kara para-upakāra
"One who has taken his birth as a human being in the land of India (Bhārata-varṣa) should make his life successful and work for the benefit of all other people."

There are many facilities in India, Bhārata-varṣa, for executing devotional service. In Bhārata-varṣa, all the ācāryas contributed their experience, and Śrī Caitanya Mahāprabhu personally appeared to teach the people of Bhārata-varṣa how to progress in spiritual life and be fixed in devotional service to the Lord.

(Srimad Bhagavatam------5:19:21-------purport).