Hinduism, Islam, Christianity, Buddhism, Jainism, Sikhism and many other religions are found in India. The Constitution of India has made it mandatory to respect all the religions. Even anyone can adopt any religion. It's a matter of faith.

People of India worship various forms of nature like snake is worshiped as a God, the scared river is referred as mother, Sun is referred to as God and many more. It is believed that to purge one's sins one should take a plunge into sacred rivers like Ganga, Yamuna etc.

Throughout the world India is known for its spirituality. These excerpts from famous personalities would make it clear that India ranks top in the field of spirituality.

"India's contribution to the sum total of human knowledge has been spirituality, philosophy. These she contributed even before the rising of the Persian Empire; the second time was during the Persian Empire; for the third time, during ascendancy of the Greeks; and now for the fourth time, during the ascendancy of the English, she is going to fulfill the same destiny once more. "
------------------------------------ (Swami Vivekananda, Lectures from Colombo to Almora)

"If I were asked under what sky the human mind has most -- fully developed some of its choicest gifts, has most deeply pondered on the greatest problems of life, and has found solutions of some of them which well deserve the attention even of those who have studied Plato and Kant -- I should point to India. And if I were to ask myself from what literature we here in Europe, we who have been nurtured almost exclusively on the thought of Greeks and Romans, and of one Semitic race, the Jewish, may draw that corrective which is most wanted in order to make our inner life more truly human, a life not for this life only, but a transfigured and eternal life - again I should point to India"
------------------------------------------------------------(Max Mueller-What India can teach us)

Many pilgrims visit India for a tour to sacred places and monuments. There are countless shrines, temples, mosques, gurudwaras, churches, synagogues, etc, in India.

To make your search easy, here is a list of tourism packages at reasonable rates:

Ajmer Pilgrimage Tours	Amarnath Yatra	Amritsar Pilgrimage Tours	Bodh Gaya Pilgrimage Tours	Char Dham Yatra Pilgrimage Tours
Dwarka Pilgrimage Tours	Kailash Mansarovar Yatra	Kanchipuram Pilgrimage Tours	Mathura Pilgrimage Tours	Rameshwaram Pilgrimage Tours
Somnath Temple Patan Tours	Tirupati Tirumala Pilgrimage Tours	Vaishno Devi Pilgrimage Tours	Varanasi Pilgrimage Tours