Deutschland: Rakotzbrücke - also called the 'Devil's Bridge' is located in the Azalea and Rhododendron Park Kromlau - a park in the municipality of Gablenz, in the district Görlitz, Saxony, Germany (less that 6km from the Polish border). It was built in the 19th century and constructed so that when combined with its own reflection, creates a perfect circle.
Durdle Door is a natural limestone arch on the Jurassic Coast near Lulworth in Dorset, England. It is privately owned by the Welds, a family who owns 12,000 acres in Dorset in the name of the Lulworth Estate. It is open to the public.