They are never parked on the runway . They park on taxiways designated for parking.
Helicopters, a Harrier Jet
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Terminal or simply parking or tarmac
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They can be found in area 69 near the runway in the desert. They can be found in area 69 near the runway in the desert.
Helicopters can land on a normal runway although they don't always have to touch the ground, a helipad is specifically designed for a helicopter.
That is called the maintenance apron.
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There are some aircraft that don't need a runway, like helicopters and VSTOL planes, but by having a smooth runway for the aircraft to gather speed you end up using a lot less fuel.