Marsk Tower is a sculptural observation tower located in the marsh landscape of the Wadden Sea National Park in southern Denmark. Designed by Bjarke Ingels Group (BIG), the 25-metre-high tower provides panoramic views across the flat marshland and towards the North Sea.

The tower is constructed in weathering corten steel and shaped as a twisting double-helix structure. Two spiral staircases guide visitors to the top platform while gradually revealing the surrounding landscape.

Part of the Marsk Camp development, the tower acts as a landmark destination within the UNESCO-listed Wadden Sea landscape and offers a new perspective on the unique environment of the Danish west coast.