Crymlyn Bog, Nature reserve and wetland near Swansea, Wales.
The reserve spans 268 hectares of lowland fen, containing extensive reed beds, sedge meadows, and waterlogged willow scrub across the landscape.
The wetland formed in a valley where the Rivers Clydach and Neath previously flowed during past inter-glacial periods, marking boundaries between different lordships.
Scientists and researchers regularly visit the reserve to study and document the rare plant species and monitor the population of the fen raft spider.
Visitors can explore the wetland through designated boardwalk trails, including the one-mile Bog Walk that takes approximately 45 minutes to complete.
The reserve contains one of only three known populations of the fen raft spider in the United Kingdom, indicating excellent habitat conditions.
GPS coordinates: 51.63640,-3.88833
Latest update: March 12, 2025 10:16
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