The document lists 6 cities or locations that are centered around houses of worship: Vatican City which centers around St. Peter's Basilica, Mecca which centers around the Kaaba at the Grand Mosque, Angkor Wat which centers around the main Angkor Wat temple, Medina which centers around the Prophet's Mosque, Borobudur which centers around the Borobudur Temple, and the Punjab region of India which is home to many Sikh temples and gurdwaras.