Kepsari Lighthouse, located off the coast of the Estonian island of Saaremaa, is tilted transversely to one side and is constantly pushed by the waves of the Baltic Sea. When it was built in 1933, it stood on solid ground more than 80 feet from the coast; But over the course of the twentieth century the sea continued to move toward the lighthouse, and waves and currents caused it to tilt the famous Pisa tower.