BIG's spiralling double-helix viewing tower revealed

The first photos of the recently opened Marsk Watchtower in Denmark designed by architecture studio BIG have been unveiled.
Created to attract tourists to the area, the 25-metre-high viewing tower within the Wadden Sea National Park has a double helix structure.
Marsk Watchtower recently opened in Denmark
It recently opened at the Marsk Camp, which is surrounded by UNESCO World Heritage-listed marshland in southwestern Denmark.
Standing alongside the campsite's restaurant and cafe, the tower ris