The Old City of Jerusalem is a walled city spanning just one square kilometer yet containing the world's most significant holy sites. Divided into four quarters - Jewish, Christian, Muslim, and Armenian - it houses the Western Wall, Church of the Holy Sepulchre, Al-Aqsa Mosque, and Dome of the Rock. The narrow alleyways, ancient souks, and interwoven history create an unparalleled destination. A UNESCO World Heritage Site since 1981, it remains one of humanity's most sacred and contested places.