The Wiselboom Bridge spanned the river Lliedi at Llanelli.

“The ironmaster Alexander Raby carried his branch railway to Cae-Maen colliery over the old course of the Lliedi river 150m upstream of the ‘ironbridge’ c. 1801. It seems that this [Wiselboom bridge] was also made of iron… The remains may lie under the site of railway sidings at the end of Parkview Terrace.” The Archaeology of an Early Railway System: The Brecon Forest Tramroads by Stephen Hughes, 1990.

Llanelli Mormons performed their baptisms under the bridge in the 1840s/50s, often at night to avoid hecklers, as there was some opposition to their preaching. (information recieved from JillMorgan, 2020). 

See article on the bridge by Jill Morgan on the Llanelli Community Heritage website.