Where do you want your photo to take place? Make sure it's a real place that you can go to, and not just a green screen and a photo you found on Google.
Think of what time of day you want to get your photo. If it is sunrise or sunset, you will be able to get a cool silhouette, probably making the most dramatic photo. But you can choose what time.
Find your subject. Once you're at the location at the time you want, find what you are taking a photo of. Is it an animal? Maybe some friends?
Once you've found your subject, place them where you want them to go and make sure you have that great background. Then, snap! (You don't need a professional camera. Phones work just fine.)
You're done! But if you think your photo isn't dramatic enough, you can play around with filters. Try lowering the exposure and balance, raising the contrast and black point just a little, and lowering the brightness. For the most dramatic photo, lower the saturation to about -50. That's it!