Access to the city is through a 1.2-kilometre-long (0.75 mi) gorge called the Siq, which leads directly to the Khazneh. Famous for its rock-cut architecture and water conduit system, Petra is also called the 'Rose City' because of the colour of the stone from which it is carved. It has been a UNESCO World Heritage Site since 1985. UNESCO has described Petra as "one of the most precious cultural properties of man's cultural heritage".
In 2007, Al-Khazneh was voted one of the New7Wonders of the World. Petra is a symbol of Jordan, as well as Jordan's most-visited tourist attraction. Tourist numbers peaked at 918,000 in 2010, but there followed a temporary slump during the political instability generated by the Arab Spring, which affected countries surrounding Jordan. Visitor numbers subsequently increased and reached a record-breaking 1.1 million tourists in 2019, marking the first time that the figure rose above the 1 million mark.