Ad-Dayr, also known as The Monastery, is a monumental facade carved into the rock face in Petra, Jordan, offering a breathtaking reward for a challenging hike. Access requires a strenuous ascent of over 800 steps from the Petra Basin, making it inaccessible for wheelchairs and those with significant mobility issues; sturdy hiking shoes and plenty of water are essential. While it can be visited solo, a guide can provide invaluable historical context during the journey through the ancient site. The site is open year-round, but ideal visiting times are spring (March-May) and autumn (September-November) to avoid extreme summer heat or winter cold. The cost is covered by the general Petra entrance fee (e.g., 50-60 JOD for multi-day passes for non-Jordanian visitors staying overnight), with no additional fee for Ad-Dayr itself, though donkey rides may be offered for an extra cost. A typical visit, including the challenging hike up and down, requires 3-4 hours, so visitors should plan accordingly and start early to beat the heat and crowds. The surrounding viewpoints offer unparalleled panoramic vistas of the Petra landscape.