Global Stack, a developer of Edge data centers, helipads, and parking garages, has proposed the construction of a data center on the former Calistoga fairground in California, north of San Francisco.The former fairground was shuttered in 2018, and the 70-acre parcel was sold to the city of Calistoga back in 2024. The city then formed the Fairgrounds Advisory Committee in 2025 to decide what to do with the land.Global Stack’s proposal – one amongst many – would add a garage, an 8-10MW Edge data center, and a ‘vertiport’ that would enable “year-round air shuttles and emergency response flights” onto the existing fairground site.But these vehicles, known as Electric Vertical Take-Off and Landing (eVTOL) vehicles, have not been approved for use in the US.Global Stack, founded in March, intends to build similar sites on at least 70 other fairgrounds across the whole of California. A list of these sites can be found in the company's presentations here and here.These presentations also reveal that Global Stack is merely the holding company, and that the various components of the project would be managed by different companies. The data center build would be done by MeshClusters LLC; the parking by DAA Parking LLC; and the eVTOL landing network by PanGalatica LLC.Several residents expressed their opposition to the proposed project at the Fairgrounds Advisory Committee meeting on Thursday, June 25, citing concerns about the aesthetic compatibility of the project with the neighborhood, its environmental impact, and whether a data center is the best use of the land.Calistoga is located in Napa Valley. The city is not home to a data center, and most of California’s data centers are clustered around Los Angeles, San Francisco, and Sacramento.