Artist Peter Callesen has probably seen more than enough paper-based artwork over the years, so he decided to get creative with it by using single sheets to create mind-blowing sculptures, like the castle you see above. Continue reading to see ten more.

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10. Cowboy

9. Hanging On

8. Ship

7. Reflection

6. Bare Hand

5. Ruins

4. Just Half

3. Snowballs

2. How Times Change

1. Tower of Babel