Nant Gwrtheyrn

Nant Gwrtheyrn is a residential Welsh language centre in Llithfaen, Pwllheli, Gwynedd, for which the Nant Gwrtheyrn Trust is responsible. The centre specialises in Welsh for Adults as a second language and runs intensive residential courses throughout the year. Students on residential courses stay on site in former quarrymen's cottages upgraded to a four-star standard, while visitors to the area can explore the Heritage Centre and its displays on Welsh language and culture.

In 2024, Cambrian News reported that most learners who attend the intensive courses and stay at the Nant Gwrtheyrn site make extensive progression within a very short period. The centre has more than 10,000 followers on Facebook and has links to its Facebook page and website.

Nant Gwrtheyrn suits adults learning Welsh as a second language who want an intensive residential course with on-site cottage accommodation in Llithfaen, Gwynedd, as well as visitors to the area interested in the Heritage Centre's displays on the Welsh language and culture. Its residential courses do not suit learners who cannot stay on site at the centre in Llithfaen, Gwynedd, or those who are not looking for an intensive residential Welsh for Adults course.