Transportation across water?

Question

What are some alternatives to bridges for crossing bodies of water (like an underground tunnel or ferry service)? Please give a thorough explanation with your answer.

Thanks!

Answer 1

underground tunnel or ferry service

You can look each up to get more info. Seems silly for me to just copy it.

http://en.wikipedia.org/wiki/Ferry

http://simple.wikipedia.org/wiki/Tunnel

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