This example explores Dutch RDW parking facility data by fetching an overview of locations and then retrieving detailed information for the first ten facilities. The visualization prepares data for a bar chart by logging unique values for fields like limited access, while commenting on future steps for scales, axes, and bars. It uses d3.json with a CORS proxy to access the external API, chains Promises with Promise.all, and relies on D3 v6 for SVG rendering and data manipulation.