The blue-domed King Abdullah I Mosque is the only mosque in Amman that welcomes non-Muslim visitors, and a ticketed visit outside prayer times allows travellers to admire its vast octagonal prayer hall beneath the striking mosaic dome. Modest dress is required and robes are provided. A small Islamic museum on site adds context, and knowledgeable staff explain the architecture and faith, making the visit a rare and rewarding chance to experience a working mosque in the capital.