
The old, disused Salt Island lighthouse is inside the restricted area of the Holyhead port. Owned by the Stena Line ferry company it is open only by special arrangement. (Photo: Ken Trethewey, 2014)

Close-up of the lantern. (Photo: Ken Trethewey, 2014)

Looking up to the lantern. (Photo: Ken Trethewey, 2014)

Climbing the tower. (Photo: Ken Trethewey, 2014)

Climbing the tower. (Photo: Ken Trethewey, 2014)

The stairs up to the lantern. (Photo: Ken Trethewey, 2014)

Inside the lantern. (Photo: Ken Trethewey, 2014)

Inside the lantern, looking up to the cupola. (Photo: Ken Trethewey, 2014)

Two small lights are present. (Photo: Ken Trethewey, 2014)

A small exit to the gallery is close to the stairwell from the lantern. (Photo: Ken Trethewey, 2014)