Background

Peberholm: The Artificial Island Between Worlds

A man-made island where nature reclaimed the landscape—Europe's most successful ecological experiment.

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Peberholm is a remarkable 1.3 km² artificial island in the Øresund Strait between Denmark and Sweden, created as a pivotal junction between the Øresund Bridge and the Drogden Tunnel. Built from 1995–1999 using dredged seabed material, this engineering marvel was intentionally left to nature, resulting in an extraordinary ecological success story. Today, it hosts over 600 plant species, 30 nesting bird species, and rare European green toads, making it one of Europe's most unique natural experiments.

A brief summary to Peberholm

  • DK
  • Duration: 0.25 to 1 hours
  • Free
  • Environment icon Outdoor
  • Mobile reception: 4 out of 5

Local tips

  • View Peberholm from the Øresund Bridge or train crossing—the island appears as a brief stretch of green horizon where the bridge transitions to the tunnel. The moment lasts only seconds but captures the essence of the entire engineering project.
  • For distant viewing, visit Amager Strandpark or the coastal path near Dragør in Copenhagen. These vantage points offer clear sightlines of the island and the entire Øresund Link stretching across the sea.
  • Visit at sunset when light catches Peberholm's dunes, turning them gold against the silver-blue waters. This is the most visually striking time to observe the island from viewing points on the Danish coast.
  • Understand that the island is strictly protected and inaccessible to the public. This restriction is essential to preserve its ecological integrity and the remarkable biodiversity that has naturally colonized the landscape.
  • If crossing the bridge by train, watch from the window as the landscape shifts and the bridge's cables fall away. The view captures the seamless connection between infrastructure and nature that defines the project.
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Getting There

  • Øresund Bridge by car

    Drive across the Øresund Bridge from Copenhagen toward Malmö (approximately 16 kilometers, 20–25 minutes depending on traffic). Peberholm appears as you transition from the bridge's upper levels to the tunnel portal. The island is not accessible to vehicles; you will pass over and through it as part of the bridge crossing. Toll fees apply: approximately 335 DKK (45 EUR) for a standard car, payable at the toll station before entering the bridge.

  • Øresund Bridge by train

    Take the Øresund Train from Copenhagen Central Station toward Malmö (journey time approximately 35 minutes). Peberholm is visible from the train windows as you cross the bridge and approach the tunnel portal. The train passes directly over the island, offering brief but clear views of the landscape. Train tickets cost approximately 95–150 DKK (13–20 EUR) depending on time of booking and travel time.

  • Coastal viewing from Amager Strandpark

    Travel to Amager Strandpark in Copenhagen (approximately 10 kilometers south of the city center, 20–30 minutes by bus or car). From the park's coastal paths, Peberholm is visible across the water as part of the Øresund Link stretching toward Sweden. This is the primary public vantage point for observing the island without crossing the bridge. No entrance fee; free parking available.

  • Coastal viewing from Dragør

    Visit the historic fishing village of Dragør (approximately 25 kilometers south of Copenhagen, 30–40 minutes by car or bus). The coastal path near Dragør offers clear sightlines to Peberholm and the entire Øresund infrastructure. This location provides excellent sunset viewing opportunities. No entrance fee; limited street parking available in the village.

Peberholm location weather suitability

  • Weather icon Any Weather
  • Weather icon Clear Skies
  • Weather icon Mild Temperatures

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Engineering Marvel at the Heart of the Strait

Perberholm was constructed as a critical structural and functional component of the Øresund Fixed Link, the massive infrastructure project connecting Copenhagen and Malmö. Built between 1995 and 1999, the island spans approximately 4 kilometers in length and 500 meters in width, covering 1.3 km² (130 hectares). Its creation required approximately 9 million cubic meters of dredged material from the tunnel trench, supplemented by 1.6 million tons of stone embankments. The island's name—meaning "Pepper Islet" in Danish—was chosen to complement its natural neighbor, Saltholm ("Salt Islet"), located 1 kilometer to the north. The island serves as the crucial transition point where traffic shifts from the two-level bridge structure to the single-level tunnel portal. This engineering solution was necessary because a bridge spanning the entire distance between Copenhagen and Malmö would have interfered with obstacle-free zones required around Kastrup Airport and would have been too high for freight train traffic. Peberholm's location ensures optimal water flow through the strait while enabling seamless traffic management between the bridge and tunnel systems.

A Bold Experiment in Natural Succession

What makes Peberholm truly exceptional is the decision to leave it entirely to nature. No landscaping occurred, no soil was imported from the mainland, and nothing was planted by human hands. The barren island was simply left open, allowing plant and animal species to colonize naturally from Denmark and Sweden. This unprecedented ecological experiment has yielded astonishing results. Within just a few years, the lifeless landscape transformed into a thriving ecosystem teeming with biodiversity. Today, Peberholm hosts an estimated 600 plant species, including rare orchids carried by wind from mainland meadows. Approximately 30 bird species nest on the island annually, including geese, ducks, great cormorants, and waders. The white-tailed eagle is frequently observed during winter months. Perhaps most remarkably, the European green toad—a rare and protected species in Denmark—established a thriving population in the island's ditches. A 2007–08 survey counted 2,500 individuals, representing one of Scandinavia's largest populations of this species.

Protected Sanctuary and Conservation Efforts

Recognizing the island's ecological significance, Danish and Swedish authorities implemented strict protective measures. Peberholm has been designated a Natura 2000 site since 2000, affording it protection under European conservation law. The island is classified under two bird protection habitats (H110 and H126) and forms part of Natura 2000 area 142, which encompasses Saltholm and surrounding waters totaling 7,218 hectares. Access is severely restricted: only authorized biologists are permitted one annual visit to areas outside the railroad and highway infrastructure. Ordinary visitors are prohibited to preserve the island's self-regulating ecological balance. Conservation management has evolved over time. By 2020, annual surveys revealed that certain species thriving in open, bright conditions were declining as vegetation increased. In response, Øresundsbro Konsortiet (the bridge operator) began selective clearing of shrubs and small trees on approximately 10% of the island's area. These targeted efforts successfully reversed the decline and restored populations of species previously at risk of disappearing.

Modern Sustainability and Infrastructure

In spring 2023, Peberholm underwent a green transformation with the installation of 10,000 square meters of solar panels on the island, supplemented by 3,000 square meters at the toll station. This solar installation now provides nearly half of the Øresund connection's electricity consumption, demonstrating how the island continues to serve both functional and environmental purposes. An emergency exit from the motorway and a helicopter pad for traffic accident response remain the only authorized human infrastructure on the island.

A Symbol of Human-Nature Harmony

Peberholm represents a unique philosophical approach to infrastructure development—the belief that when humans step back and allow natural processes to unfold, remarkable outcomes emerge. The island demonstrates that engineered landscapes can evolve into something genuinely wild and valuable. Travelers crossing the Øresund Bridge or tunnel experience Peberholm as a fleeting moment of green horizon where the bridge becomes land before descending into the water. For those seeking distant views, the island is visible from Amager Strandpark and coastal paths near Dragør, where the Øresund Link unfolds like a ribbon across the sea. At sunset, the island's dunes glow golden against the silver-blue waters of the strait, a visual reminder of the delicate balance between human ingenuity and natural restoration.

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