Siq

thumb|Al-Khazneh|The Treasury, as seen from as-Siq, right before the passage ends thumb|A walk down the Siq, 2018 thumb|upright|A niche (architecture)|niche at the entrance of al-Siq

The Siq (, transliterated al-Sīq, transcribed as-Sīq, literally 'the Shaft') is the main entrance to the ancient Nabatean city of Petra in southern Jordan. Also known as Siqit, it is a dim, narrow gorge (in some points no more than wide) and winds its way approximately and ends at Petra's most elaborate ruin, Al-Khazneh (the Treasury). A wide valley outside leading to the Siq is known as the Bab as-Sīq (Gateway to the Siq).