The USGS publishes free topographic maps that show trails, rivers, and campsites in great detail for hikers, cyclists, and adventurers.

If you've ever wondered what the elevation of your location is, you can find out with Google Maps on both desktop and mobile.

Maps help us find, discover, and reach new places. Although the field of geography is focused on locations, it is also a discipline of time. And maps are a great way to step back in time to see how ...