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Fehmarnbelt Tunnel Project Adds 300,000 Square Metres to Denmark's Coast at Rødbyhavn

architecture-design · 2026-09-17

In Rødbyhavn, Denmark, an expansive artificial island covering 300,000 square meters has been developed using surplus materials from the Fehmarnbelt Tunnel. Led by state-owned Sund & Bælt, the island will include walking paths, ponds, and habitats for wildlife. Ditte Hjort, the project manager, highlighted the importance of observing nature's evolution. The 18-kilometer Fehmarnbelt Tunnel, connecting Rødbyhavn and Puttgarden, is set to become the world’s longest road-and-rail tunnel and is expected to be finished by 2029. Its construction, which began after a 2008 agreement between Denmark and Germany, aims to cut travel time between Hamburg and Copenhagen significantly.

Key facts

  • The Fehmarnbelt Tunnel land reclamation added approximately 300,000 square metres to Denmark's southern coast at Rødbyhavn, equivalent to 42 football pitches.
  • The 18-kilometre road-and-rail Fehmarnbelt Tunnel is set to be the longest of its kind in the world, connecting Rødbyhavn in Denmark with Puttgarden in Germany.
  • The tunnel is scheduled for completion in 2029 and will be formed of 89 concrete elements, each 217 metres long and weighing 73,000 tonnes.
  • State-owned transport company Sund & Bælt is developing the project and said the new land will become a unique experience for visitors.
  • Project manager Ditte Hjort said the area will feature walking trails, ponds and wildlife including birds, amphibians and insects, with salt marshes and diverse plant life.
  • The added land will be landscaped with three ponds and planting able to withstand a harsh coastal climate, using soil excavated for a tunnel factory that contains plant seeds.
  • Journey times between Hamburg and Copenhagen are expected to drop to two hours by train and just over an hour by road, reducing dependence on flying.
  • Denmark and Germany signed an agreement to build the tunnel in 2008, but delays followed due to opposition from ferry operators and conservation groups.

Entities

Artists

  • Ditte Hjort

Institutions

  • Sund & Bælt
  • Urban Power
  • Dezeen
  • Google
  • Airbus
  • BBC

Locations

  • Denmark
  • Germany
  • Rødbyhavn
  • Puttgarden
  • Baltic Sea
  • Copenhagen
  • Hamburg
  • Scandinavia
  • Europe
  • Lynetteholm
  • Holmene

Sources