Ten giant hardwood tree trunks have been installed at the National Botanic Gardens in Carmarthenshire.
The 'Ghost Forest' as it's known is described as "the most important environmental art installation ever to come to Wales". The 20 tonne trunks represent the depletion of the world's natural resources.
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The whale is made of bags, bottles and other single-use plastics pulled from the ocean, beach and recycling plants.
Skies will cloud over with outbreaks of rain and drizzle.
An article in The Sunday Times found Isis used a network of companies operating out of an office in Cardiff to finance terror plots.