About 70 km from mainland Germany, the cliffs of Helgoland rise 60 meter from the North Sea. The high cliffs are home to the only seabird colonies in Germany, where species like Gannet, Guillemot, Razorbill and Kittiwake breed. These seabirds come to land only to breed and they spend the rest of the year at sea. From the top of the cliffs, the breeding birds can be seen up close. For many migratory birds, Helgoland is an important stopover because of its isolated position in the North Sea. Helgoland is a popular tourist destination, mainly due to the tax-free sales of tobacco, alcohol and perfume.