An absolutely stunning (and hugely informative) 3D plot of US, Germany and Japan yield curves: http://www.nytimes.com/interactive/2015/03/19/upshot/3d-yield-curve-economic-growth.html?rref=upshot&smid=tw-upshotnyt&_r=0

Via @UpshotNYT

And it is interactive - you can rotate and fold curves.

While at it, another @UpshotNYT stunning visualisation: 255 charts showing how the Great Recession reshaped the economy: http://www.nytimes.com/interactive/2014/06/05/upshot/how-the-recession-reshaped-the-economy-in-255-charts.html?abt=0002&abg=0