I recently found some stunning visualizations. I preferred to share them all:
$5)$ Mean inequalities [from Proof without words]
$4)$ Streographic projection [by H.Segerman]
$3)$ Farey-Ford Tessellation in non-euclideanEuclidean geometry [by F.Bonahon]
$2)$ Steiner porism [by Wikipedia]
$1)$ Polynomial roots [by J.Baez]
Aren't they Incredible?? Aren't they incredible?