The development is crowned by a one-hectare Sky Park bridging the two towers. The Sky Park offers panoramic 360-degree views of Singapore’s skyline
https:// www.aconex.com/projects/marina-bay-sands
BTW Aconex hosts most of the world's largest building, construction and engineering projects from the last 18 years. They are a document and project management platform that recently was sold to Oracle.
Technically Oracle now has all the blueprints and plans for large scale infrastructure and buildings. Granted you need to be a DB admin to access.