The world is full of amazing sights, but with so many masters of Photoshop online, the Internet also holds plenty of fanciful worlds that only look real. We've been scouring Pinterest for amazing fakes and must-see real destinations, and now we're challenging you to tell them apart.

To play along, decide whether you think each photo is real or not. Then click to the next picture to find out if you're right.

Guess: Does this crescent moon building see the light of day?