Umm ar-Rasas is an ancient city located in the Jordanian desert, about 30 km southeast of Madaba. The site dates back to the Roman and Byzantine periods and contains well-preserved ruins that reflect its strategic importance as a commercial and military center in the region.

One of the most remarkable features of Umm ar-Rasas is the collection of mosaic floors that have survived in the city's churches and public buildings. These mosaics are notable for their intricate designs and use of geometric patterns, flora, and fauna motifs, as well as scenes from daily life and biblical stories.

The city's most significant monument is the Church of St. Stephen, which is renowned for its well-preserved mosaic floors that cover most of the interior. The mosaics in the church include scenes from the Old and New Testaments, including the story of Jonah and the whale.

Umm ar-Rasas was designated a UNESCO World Heritage Site in 2004 in recognition of its well-preserved ancient ruins, which offer a glimpse into the area's history and cultural heritage. The site is open to visitors year-round, and guided tours are available to help visitors explore the city's many archaeological treasures.