Seems to be a lot of films & TV shows were people park their car/truck/horse/TARDIS hundreds of metres from their destination for no apparent reason.
This is opposed to those times where there's always a carpark right in front of the door, against all probability.
An example of this is from the film Thor, where the hero and his friends are riding horses along the Bifrost bridge. About 100 metres from the dome, they stop their horses, dismount, and apparently walk the rest of the way. The horses, presumably mystical, aren't seen again.
You can see this in action here:
Is there a particular reason for this? Is it a deliberate thing, or is it just a Trope?