DECKTHEWALLS
TeleGeography make these huge maps (1.27 m x 0.9144 m) of the world's internet infrastructure, outlining all the submarine cables that transport our 1s and 0s around the world. They're expensive (US$250), but are now US$125 until the end of the year - which is still expensive, but not as expensive.
I always knew there were a bunch of cables in the sea, didn't know it was that many!