Yesterday, Google Cardboard revealed that Maps has a pretty awesome easter egg hidden in plain sight - users can take a look at streetview through Cardboard with a simple tap.
As the gif below explains, users need only double-tap the "look around" FAB in streetview to trigger a stereoscopic view of the location they've looked up.
Slide your phone into a Cardboard viewer, and you can "see the sights" just like you were there (as long as you've got a fast connection, anyway).
Google appears to be going full-tilt on its Cardboard VR effort - the team is hiring, new SDKs have been announced, and Google plans to open up tool-specific viewer specifications for those individuals or companies who want to build their own viewers. Hopefully this means we'll get even more clever treats from the foldable phenomenon.
Source: Google Cardboard (Google+)