Peberholm Travel Guide

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.

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.

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.

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.

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.