City In The Sky

Here's a bit of filler in the vein of the sci-fi megastructures.

Proving that for some, sky is not the limit, the Megatropolis project gathered quite a few interesting ideas, emphasizing on urban life in the future. One of the concepts belongs to architect Tsvetan Toshkov and reveals a futuristic, lotus- inspired city, far above the sky-scrapers man kind is so familiar with: “City in the sky is a concept about a tranquil oasis above the mega developed and polluted city where one can escape from the everyday buzz, smog and dirt. The concept is inspired by the Lotus flower which is known for its ability to emerge above the murky waters pure and clean“. Even though the project did not make it to the final stage, the idea was taken further and presented in a short movie, that we are certain you will find original and intriguing. Have a look and don’t hold back from sharing your reactions regarding this future-city concept.
[Freshome.com]

Floating City's and Crystal Spires have long been sci-fi and fantasy tropes since... well, since forever.

Here we see them brought together in the form of a crystal lotus tower that would most likely spell certain death to those below if the windows blew out or some other form of structural failure caused part of the building to fall on the city below.

Still this would make for a spectacular set piece for an adventure in AtB or just about any other sci-fi game setting.