I want to go to some famous cliffs because I want to see the amazing view but It is hard to look down in the extremly high place.
It is okay if there is window to see the view safely.
But I don't have money to buy helicopter...

Thank you! Enjoy your weekend!

Let each one keep seeking, not his own advantage, but that of the other person.​—Corinthians 10:24.

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I want to go to some famous cliffs because I want to see the amazing view, but it is hard to look down from an extremely high place.
It is okay if there is a window to see the view safely.
But I don't have money to buy a helicopter.

= "in" is used in an enclosed space, areas, or regions
= "from" is used to show a starting point. 
= "window" and "helicopter" are both countable
= Great answers! Let's keep it up!