This example visualizes a hierarchical family tree of world landmarks, showing parent-child relationships from “World” down to individual sites like the Taj Mahal and Stonehenge. The graph uses a static tree layout rendered as SVG circles with text labels, animated via D3 transitions that draw connecting paths and expand nodes over time. It employs `d3.stratify()` to structure the data, `d3.tree()` to compute positions, and D3 transitions to animate path drawing and node appearance. The styling uses maroon strokes and light green fills, with all elements centered on the page.