Minimap - (top right) Allows for quick navigation.
Legend - (bottom right) Toggle map elements on/off.
Search - (top left) Search for basic info, it will bring up relevant locations and take you there.
Drag Scale - Hold CTRL and click/drag mouse to see the distance in miles.
Info Boxes - Some locations will pop-up an info box when hovered on; "pulsing" icons can be clicked on to bring up an additional description.