Mecca from the last 1,500 years have survived Saudi rule. Expansion of the city is ongoing and includes the construction of tall Abraj Al Bait Towers across the street from the Masjid al-Haram. The towers were the third tallest building in the world when completed in 2012. The construction of the towers involved the demolition of the Ajyad Fortress, which in turn sparked a dispute between Turkey and Saudi Arabia. The Zamzam Well is home to a celebrated water spring. The Qishla of Mecca was an Ottoman castle facing the Grand Mosque and defending the city from attack. However, the Saudi
Mecca failures of crowd control because of the large numbers of people who come to make the Hajj. For example, on 2 July 1990, a pilgrimage to Mecca ended in tragedy when the ventilation system failed in a crowded pedestrian tunnel and 1,426 people were either suffocated or trampled to death in a stampede. On 24 September 2015, 700 pilgrims were killed in a stampede at Mina during the stoning-the-Devil ritual at Jamarat. Mecca is at an elevation of above sea level, and approximately inland from the Red Sea. Central Mecca lies in a corridor between mountains, which is often called