World Mapper: a powerful representation of where strengths and weaknesses, and irrational imbalances exist in our world.
Latitude and Longitude: Find a point anywhere in the world and read its coordinates.
Tarquin A source of fun mathematics materials
Powers of Ten: http://powersof10.com/film : an adventure in magnitudes, from the outer edges of the universe to inside a proton of a carbon atom within a DNA molecule in a white blood cell.
SpaceSounds listen to the edges of the universe
Turquoise Mountain conserving historical monuments (and much more) in Afghanistan.