9-Bedroom Hot Tub Manor in Talsarnau

Harlech Castle is a medieval fortification in Gwynedd, built onto a rocky knoll close to the Irish Sea. Edward I had it built during his invasion of Wales, and it is one of the castles UNESCO includes in its World Heritage listing for the finest late 13th and early 14th century military architecture in Europe.

Caernarfon Castle is a medieval fortress in Gwynedd, north-west Wales. Edward I began replacing an earlier motte-and-bailey castle with the current stone structure in 1283, and it was built on a grand scale as the administrative centre of north Wales.

Dolwyddelan Castle is a thirteenth-century castle in Conwy County Borough, probably begun by Llywelyn ab Iorwerth, ruler of the Kingdom of Gwynedd, to guard an east-west route through his lands. It stands on a small knoll, with a keep on the east side and a tower on the west, joined by walls to form a roughly circular enclosure.

Anglesey Sea Zoo is an independent aquarium and marine conservation centre on the south coast of Anglesey, near Brynsiencyn. Over 40 tanks show native British sea life, including octopus, lobsters, seahorses, conger eels and jellyfish. Highlights include the No Bone Zone for invertebrates, a wolf fish lair, a real crashing wave, a shipwreck and a kelp forest full of big fish.

Tip: No need to book ahead, as tickets are bought on the door. Standard and family tickets stay valid for 6 days after the day of purchase, so you can return for free in that time.

Dolbadarn Castle (Castell Dolbadarn) was built by the Welsh prince Llywelyn the Great in the early 13th century. It stands at the foot of the Llanberis Pass, overlooking the lake of Llyn Padarn, and once controlled an important mountain pass. Today it is a grade I listed building, owned by Cadw and run as a tourist attraction.

The Conwy Valley Railway Museum sits beside Betws-y-Coed railway station, on the site of the old goods yard. The museum building holds a collection of railway artefacts, and the attraction began with a former standard gauge railway carriage, which is a licensed buffet and restaurant car.

Plas Newydd is a country house on the north bank of the Menai Strait, with views across the water to Snowdonia. The house has origins in 1470 and was long the seat of the Marquesses of Anglesey.

Tip: Dogs on short leads are welcome in the gardens, but not on the Terraces. Autumn is a busy season for the red squirrels, so stay quiet in the woods.

Conwy Castle was built by Edward I between 1283 and 1287 and is part of a World Heritage Site. Eight large towers and a high curtain wall still stand, and it has the best preserved set of medieval royal apartments in Wales. The ruins are split into an inner and an outer ward, with a Great Hall undercroft and chapels to explore.

Tip: Climb the spiral staircases and walk the full battlement circuit if you can. Cadw highly recommends it.