From the Old Bailey Online

Zoomable Treemap: Offences 1700-99 by categories, sub-categories, decades

"Treemaps are a form of space-filling layout where the area of each rectangle is proportional to its value" - based on this example. I rather like this one, though it doesn't handle labels on very narrow rectangles perfectly.

Click any cell to zoom in, or the top orange label to zoom out.