Downhill Demesne (Castlerock)
An outdoor historic-house-gardens in County Londonderry
Explore coastal paths, gardens and historic ruins at Downhill Demesne near Castlerock. Mussenden Temple stands above the sea, with its interior normally closed to general visits. The estate has facilities at Lion’s Gate, including toilets and a coffee outlet with seasonal hours. Check current National Trust visitor information and parking charges before travelling.
At a glance
Ages
1–18+
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Today
Moderate drizzle
16°C
Light showers expected — plan for indoor spells
Opening hours
Opening hours could not be confirmed.
Last checked 24 May 2026, 11:09.
Grounds accessible dawn to dusk year-round; specific facility hours may vary. Mussenden Temple open for public during events only due to conservation requirements.
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