Other sights in GwyneddGwynedd, Wales

Thomas Telford's 1826 suspension bridge across the Menai Strait, the world's first major iron suspension bridge.

A rack-and-pinion railway climbing from Llanberis to the summit of Yr Wyddfa, the only one of its kind in Britain.

Narrow-gauge heritage lines from Porthmadog to Blaenau Ffestiniog and through the mountains to Caernarfon.

An inland crag near Tywyn where cormorants nest, unusual for a colony so far from the present coast.

Vast abandoned slate terraces above Llanberis, part of the UNESCO Slate Landscape World Heritage Site.

A steep glacial pass carrying the A4086 over Pen-y-Pass between the Snowdon massif and the Glyderau.

A wooded gorge south of Beddgelert where the Afon Glaslyn tumbles through, followed by the Fisherman's Path.

One of the highest public-road mountain passes in Wales, climbing between Bala and Dinas Mawddwy.

A forest park north of Dolgellau with a visitor centre and pioneering purpose-built mountain-bike trails.

A glacial cwm below the Glyderau with the dark cleft of Twll Du (Devil's Kitchen) above Llyn Idwal.

A riverside memorial at Beddgelert to the legendary faithful hound Gelert, in a meadow below the village.

Guided adventure trips through old slate mine workings at Cwmorthin, with zip lines, abseils and boat crossings deep underground.

A wooded headland above Llanbedrog beach topped by the steel Tin Man sculpture, with coast views.

A deep-mine tour and Zip World adventure site in the slate landscape at Blaenau Ffestiniog.

A wide tidal estuary of sand and saltmarsh between Dolgellau and Barmouth, followed by the Mawddach Trail.

The former Dinorwig quarry workshops at Llanberis, preserved as a museum of the Welsh slate industry.

A short hillside path above Barmouth giving views over the Mawddach Estuary and its railway bridge.

A huge working and historic slate quarry at Bethesda, part of the UNESCO Slate Landscape and home to Zip World Velocity.

A near-level path around Foel Cynwch above Dolgellau with views over the Mawddach and Cadair Idris.

A flagged medieval packhorse trail climbing a pass through the Rhinogydd above Cwm Bychan near Llanbedr.

A restored Victorian copper mine near Beddgelert offering audio-visual tours through its chambers and formations.