The document discusses three holiday destinations abroad: 1. Zhangye Danxia Landform Areas in China, also known as the Rainbow Mountains, which are colorful cliffs formed 200 million years ago that cover an area of over 400 square kilometers. 2. Fort Bourtange in the Netherlands, a star-shaped fort built in 1593 on the German border that now serves as a historical museum. 3. The Alcazar of Segovia castle in Spain, located in the town of Segovia near Madrid, which is rumored to have inspired Cinderella's castle and is one of Spain's most famous castles.