Find where a photo was taken by EXIF data

Problem:
You see a cool photo your friend took, and want to visit that spot, but you don't know where exactly the photo was taken.

Solution:
Since many people take photos via their smartphone nowadays, chances are the image has EXIF data that would show the location. Upload the photo (or if it's already on the web, paste in the URL) to Jeffrey's Exif Viewer and see exactly where it was taken.