The Rainbow School, officially named "The Ark Soaring in the Sky," is an innovative educational facility completed in 2013 in Sangkhla Buri District, Kanchanaburi Province, Thailand. Designed by architect Kikuma Watanabe in collaboration with D Environmental Design Systems Laboratory, this primary, secondary, and high school building exemplifies contemporary architectural excellence. The structure's distinctive design creates a harmonious learning environment while integrating seamlessly with its natural surroundings. The building's name reflects its symbolic representation of hope and aspiration, making it a significant landmark in Thai educational architecture and a notable example of cross-cultural design collaboration.