flight of fancy

am chuckling at this Goetheanum entry in an online travel guide:

It’s as though a flight of fancy had swooped down upon the hillside to hatch the edifice. The building currently houses the Anthroposophical Society and the School of Spiritual Science founded by Rudolf Steiner. It’s possible to enter and explore the building – the terrace on the monumental second storey offers the strangest emotions, seemingly rings the entire structure, giving you the impression that you are standing on a ghostly tectonic surface outside space and time and whatever is happening below.