After the Elephant World project wrapped up in 2021, Premthada kept returning to the villages and found elephant dung piling up on roads and outside houses.
He began experimenting with dung as a construction material, mixing it with soil, cement, and local plant matter to produce bricks that could be sun‑cured.
The first public test appeared at the Île‑de‑France Architecture Biennale in 2022; later, the same method was used in London and Venice, proving the process could be adapted to different settings.
In 2025, the architect built Goya Tower in Phang Nga, using 33‑cm circles, 5‑cm thick bricks hand‑shaped and sun‑cured, stacked into five sunset‑inspired colors that form both the façade and structural core.
The tower sits at the entrance to Matalay resort, overlooking the limestone formation known as Elephant Mountain, tying the building to local lore and the region's long relationship with elephants.
Local artisans from Ta Klang Village helped shape the bricks, turning a waste stream into a symbol of sustainable architecture that could inspire similar projects across the country.