St. Eunan's Cathedral is located in Letterkenny, County Donegal, Ireland. It was built in the late 19th century and is dedicated to St. Eunan, the patron saint of Donegal. The cathedral features a striking Gothic Revival architectural style, characterized by its tall spires and intricate stonework. The cathedral serves as the seat of the Roman Catholic Diocese of Raphoe. Inside, visitors can find beautiful stained glass windows and a serene atmosphere, making it a popular destination for both worship and tourism. The surrounding grounds also offer scenic views of the town and countryside.