This interactive map visualizes Airbnb listings in Denver overlaid on a zoomable map of the United States. Clicking on Colorado triggers an animation that transitions to a detailed view of Denver neighborhoods, with red dots marking individual listings. The visualization uses D3.js v3’s `d3.geoPath` for map projections and `d3.transition` for smooth zooming, sourcing geographic data from a GeoJSON file and listings from a CSV file.