Whithorn is the site where the earliest evidence of Christian settlement, practice and worship has been found in Scotland. The Whithorn Trust runs the archaeological site, which includes a permanent exhibition showing the different peoples who occupied the site over 1500 years, temporary exhibitions including items from National Museums Scotland each year, a Museum (in partnership with Historic Environment Scotland) of early mediaeval carved Christian stones, and the ruins of the Priory and its crypts. In addition, there is a full-scale Iron Age roundhouse, based on archaeological excavations from 2013-2019, yielding evidence from a settlement nearby and dated to approximately 450BC; the roundhouse is accessible through guided tours at regular intervals throughout the day.

The site is open from March 31st (or Easter if earlier) to October 31st each year; tickets include all parts of the site and are valid for one year. The Trust has a coffee shop which serves light lunches and home baking made on the premises and a shop which sells local crafts.