The capital city Hyderabad, twin city of Scunderabad, seaport towns of Vishakhapatnam and Vijayawada are important with palaces, museums, parks and religious sites. Charminar, a four-towered ancient edifice, the famous citadel of Golconda are some of the many mesmerizing architectures across the state. Ancient cities of Amravati and Nagarjunasagar were the core Hindu and Buddhist kingdoms in the past and retains the rulers' enigma in its architecture and heritage. Tirupati, Puttaparthi,Tirumala are spots of religious relevance. Warangal, Kakinada, Guntur, Nizamabad and Nellore are other place of importance.