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Lana: Okay, the passageways open up Begin at the hill?
onto a steep hill. It's far off the road. Away from the road?
It'll take us a while to climb up.

Chloe: If it means saving Clark,
I'd climb Mount Everest.
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Madhulkopen up Begin at the hill?

Here, "open up" means emerge from underground, or from a building. So, the passageways' entrances/exits lie on a steep hill.
Madhulk far off the road. Away from the road?
Yes, a long way from the road.
Comments  
Thanks, Mr Wordy!