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 rises 25 metres to give views across the national park and out towards the North Sea.
It stands next to the Marsk Camp restaurant
Made from Corten steel, the tower appears to be formed almost entirely from stacked steps.
BIG designed the structure to have a double helix formation similar to that of DNA, with 146 steps on the way up and 131 on the way down. The tower has a double helix arrangement
"Marsk tower consists of a unique construction, where the design is based on nature's twisted structure and human DNA strand," explained Marsk Camp.
"It is both a sculpture and an observation tower and is shaped like a double helix and designed in such a way that there is only one way up and another way down."
 
There are 146 steps up to the viewing platform
The tower slowly expands outwards from a seven-metre base wide to a 12-metre-wide viewing platform at its top.
A small elevator runs through the structure's core to provide accessible access.

"When you h...