Click on the drop down in the top left corner, adjacent to the Search Tool
There are multiple map views, besides the default 'Grey' setting. These are:
Streets: Displays accurate street, highway, road, etc. labels
Satellite: Satellite images of the environment
Hybrid: Combines satellite imagery with labels of landmarks
Topography: Displays the land surface in regions with diverse ground cover
*Open Street Map: Our newest base map, displays the most detailed labels, of streets, boundaries, addresses, landmarks, roadways, establishments, etc.