Fishguard rewards slow travel. The town itself has a single key sight — the Last Invasion Tapestry in the Town Hall, which commemorates the strange 1797 French landing that remains the last armed invasion of mainland Britain. Lower Fishguard harbour, ten minutes' walk below the main town, is one of the prettiest small harbours in Wales and the location used for the 1971 film of Dylan Thomas's Under Milk Wood.
The coastline is the main draw. Strumble Head to the northwest offers excellent wildlife-watching — grey seals, porpoises, and autumn seabird migration. The Pembrokeshire Coast Path passes through town and is worth walking in either direction; the Dinas Head loop to the east is the most accessible half-day walk.
Inland, the wooded Gwaun Valley runs southeast from Fishguard through ancient oak woodland to the northern slopes of the Preseli Hills — the quarry source of Stonehenge's bluestones. Pentre Ifan, a 5,500-year-old Neolithic burial chamber on the Preseli ridgeline, is one of the finest prehistoric monuments in Wales and easily reachable as a half-day trip.