Remains of Grotto in Garden of Picton Castle is a Grade II listed building in the Pembrokeshire Coast National Park local planning authority area, Wales. First listed on 26 February 1998. House.
Remains of Grotto in Garden of Picton Castle
- WRENN ID
- strange-sill-wind
- Grade
- II
- Local Planning Authority
- Pembrokeshire Coast National Park
- Constituency
- Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
- Country
- Wales
- Date first listed
- 26 February 1998
- Type
- House
- Address
- Remains of Grotto in Garden of Picton Castle, Picton Park, Slebech
- OS grid reference
- SN 016 135
- Coordinates
- 51.78508, -4.87749
- Source
- Cadw listing
Description
The remains of a grotto are located in the garden of Picton Castle. This structure consists of a mound that contains a vaulted tunnel, with its entrance on the west side. It is believed that a summer house or belvedere originally topped the mound, but this feature has since been lost.
The tunnel measures about 10 meters in length and extends from the west side of the mound into its center. It is situated above the original ground level. The walls and vault of the tunnel are made of rubble masonry, while the floor is composed of earth. The tunnel is nearly 2 meters wide and features a barrel vault. At the eastern end, there is a blocking wall that has been inserted, and the area beyond this wall remains unknown. On either side of the tunnel, there are shallow rounded recesses, three on each side, which appear to have been intended for statues. These recesses are original to the tunnel, which has a groined vault at each recess.
Local climate
Remains of Grotto in Garden of Picton Castle sits in a wetter-than-average part of the UK, with an average of 1,080 mm of rain a year. This makes it wetter than 86% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 95% of listed buildings.
It experiences an average of 6 freeze-thaw cycles a year, fewer than 96% of listed buildings. Of these, 2 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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- Stables and Coach-house at Picton Castle
- Raised Terrace at East Entrance to Picton Castle
- North Wing and Entrance Yard of Picton Castle
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- North Entrance Lodges to Picton Castle
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- Bridge at Kennel Wood
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- Cresborough