The Mill Folly Grotto including stone bridge, south of the Afon Llifon is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 8 September 1998. Garden feature.

The Mill Folly Grotto including stone bridge, south of the Afon Llifon

WRENN ID
half-step-bracken
Grade
II
Local Planning Authority
Gwynedd
Country
Wales
Date first listed
8 September 1998
Type
Garden feature
Address
The Mill Folly Grotto including stone bridge, south of the Afon Llifon, Glynllifon, Llandwrog
OS grid reference
SH 458 553
Coordinates
53.0728, -4.3018
Source
Cadw listing

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Description

The Mill Folly Grotto, located south of the Afon Llifon, is a Grade II listed irregular rustic rubble garden feature dating from the 19th century. It features picturesque pointed arches and is arranged over two levels. The lower level contains a pool, while a bridge carries the footpath over the outlet into the Afon Llifon. The structure includes a complex series of grotto-like spaces, with an underground chamber accessed by a narrow passage and an additional small chamber at the lower level. The pool is supplied by a reservoir located on the hill towards Fort Williamsburg, connected by a leat from the top of the cascade to the east. The single-arch rubble bridge has voussoirs and a modern timber deck.

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Nearby listed buildings

  1. Western Cavern north of the path near main east vista fountain Grade II 70 m
  2. Footbridge over Afon Llifon to east of house Grade II 78 m
  3. Cascade at Glynllifon Grade II 83 m
  4. Fountain at end of east vista Grade II 88 m
  5. Eastern Cavern north of the path near main east vista fountain Grade II 97 m
  6. Ionic Column on former East Drive Grade II 109 m
  7. Bridge over Afon Llifon to south-east of Glynllifon House Grade II 175 m
  8. Dovecote and attached range to left at south-east corner of farmyards at Glynllifon College Farm Grade II 189 m
  9. Fountain pool including iron pipe in Coed y Terrace wood south-west of the Farm Grade II 196 m
  10. Former Cowhouse to south-west side of upper farmyard at Glynllifon College Farm Grade II 198 m