Hegra (Ancient Greek: Ἕγρα, Arabic: ٱلْحِجْر, romanized: al-Ḥijr), also known as Madaʾin Salih (Arabic: مَدَائِن صَالِح, romanized: Madāʾin Ṣāliḥ, lit. 'Cities of Salih'), is an archaeological site located in the area of Al-'Ula within Medina Province in the Hejaz region, Saudi Arabia.
A majority of the remains date from the Nabataean Kingdom (1st century AD). The site constituted the kingdom's southernmost and second largest city after Petra (modern-day Jordan), its capital city. Traces of Lihyanite and Roman occupation before and after the Nabataean rule, respectively, can also be found. The site features more than 110 well-preserved Nabataean tombs carved into sandstone outcrops.