Why do trains have engines backwards?

Related questions

1. Can steam trains go backwards?
2. How far can a train go on a gallon of fuel?
3. Why are trains so slow?
4. Can an internal combustion engine run backwards?
5. Can a train derail?
6. How many tons can a train engine pull?
7. Do trains still run when raining?
8. Can a helicopter fly over Mt Everest?
9. Why is sand used in locomotives?
10. Do trains have reverse gear?

Tags

1. #reason
2. #rather
3. #return
4. #running
5. #around
6. #though
7. #train
8. #always
9. #typically
10. #backwards
11. #after
12. #trains
13. #because
14. #turning
15. #facing
16. #locomotives
17. #reverse