Dinorwig Slate Quarry

Filmed as Harrenhal exterior

📍 Dinorwig Quarry, Llanberis, Gwynedd, Llanberis, United Kingdom

🧭 Directions

📍 Check in ☆ Log in to save

Dinorwig Slate Quarry — Photo: Mike Pennington · CC BY-SA 2.0 · via Wikimedia Commons

Scene breakdown

Harrenhal exterior

House of the Dragon S02E03 Mild spoilers

Daemon takes Harrenhal and walks the ruined yards of the cursed castle.

Daemon Targaryen

Spoilers for House of the Dragon are hidden — tap to reveal, or change it under Spoilers in the menu.

Real-world history

UNESCO slate landscape above Llyn Peris. Season 2 and 3 used the terraces as the blasted exterior of Harrenhal — Aegon the Conqueror's melted fortress, where Daemon holds court among ghosts.

Logistics & accessibility

Admission: Quarry paths and the National Slate Museum area are visitable; some faces are working or fenced. Do not climb loose slate.

Parking & accessibility: Llanberis and National Slate Museum lots; walk or Padarn railway.

Best time to visit: May–September. Combine with Llanberis lake and Snowdon.

What else to see here

National Slate Museum

Museum

5 min
Yr Eifl / Trefor Quarry

Dragonstone exterior plates.

Quarry

40 min drive