In the drop down menu click on the "Recent Activity" tab:
Choose the specific types of activity you want to view by toggling "New Locations", "New Checkins" or "New Photos" on or off:
You can view activity nearby your location on the map, all activity or just activity for your bookmarked stations. To change your activity feed click on the small grey arrow on the righthand side of the screen:
If you want to view a specific location from the activity feed, click on the blue location name link.