Mangalagiri is a town in Guntur district situated between the twin cities of Vijayawada and Guntur of the Indian state of Andhra Pradesh. Mangalagiri is a pilgrim centre. There is a temple on the hill dedicated to Lord Panakala Narasimha Swamy. In this temple, jaggery water is offered to the Lord by the devotees. It is said that the scripture of the lord is being worshiped since Satya Yuga (The first of the four Yugas).
The lofty gopuram in the temple at the foot of the hill was erected by Raja Vasireddy Venkatadri Nayudu in 1807–1809, and in terms of sculpture and architecture this temple stands as an ultimate testament to the ancient Vishwakarma sthapathis in planning and sculpting these temples
At the bottom of the hill, there is another temple dedicated to Lakshmi Narasimha Swamy. It is believed that, Yudhishtira (Dharma Putra), the eldest of the Pandavas) installed the main deity in this temple and worshipped the Lord here. The temple has a very tall tower with beautiful sculpture which has 11 stairs.
Source:
https://en.wikipedia.org/wiki/Mangalagiri