Kashi, also known as Varanasi or Benares, is one of the oldest living cities in the world and a major spiritual center in Hinduism. It is considered the city of Lord Shiva and one of the seven sacred cities (Sapta Puri) in Hinduism.
Prayagraj, formerly Allahabad, is located at the confluence (Sangam) of three rivers: Ganga, Yamuna, and the mystical Saraswati. This confluence is considered the holiest in Hindu tradition.
Ayodhya is regarded as the birthplace of Lord Rama, the hero of the epic Ramayana. It is one of the most sacred cities in Hinduism.