The reference photos are from Linnankoski park in Töölö, Helsinki.


Materials:
Larch or douglas pine, pine, hardwoods, recycled plastic
Corten steel or hot-dip galvanized and/or painted steel
(Mentioned price: larch and hot-dip galvanised steel)


The product in the photo above has a total length of 21m, including 4 meters of curving parts
Height 30cm
Depth 45cm
Steel legs every 90cm, 25 pieces in total
(hot-dip galvanized)


The price for the product shown in the images: 10250€
Curved parts per meter: 650€
Straight parts per meter: 450€


The price of the wooden parts depends on their width and chosen materials. The photos show larch that's about 7cm wide.
The hot-dip galvanised teel parts can also be painted or made out of weathering steel.