Europe From Above: Season 4

Scotland: An aerial view of Scotland reveals an astonishing tidal energy project, a majestic cliff-top castle and the world's first golf course.

Denmark: Take an aerial journey over Denmark and discover a power plant with a ski slope for a roof, traditional homes made from eelgrass and more.

An aerial journey over Belgium reveals the work behind a popular festival, the polishing of a building shaped like an iron crystal, and the vertiginous cleaning of the country's largest church.

A spectacular aerial journey across Bulgaria reveals Varna's magnificent cathedral restoration, a UFO-like monument, and the ruins of an ancient sanctuary.

Romania: Take an aerial journey across Romania and discover the world's biggest Orthodox Cathedral, a narrow-gauge steam train and the real Castle Dracula

From a dazzling train of lights along England's coast and an Alpine fireworks show to Finland's reindeer herds, we soar over Europe to reveal how vibrant Christmas celebrations light up the continent.