Depends on what you are driving. If it is a motor vehicle you can park pretty close, depends how good your steering and your eyesight are. If you are driving the starship Enterprise you could park numerous lightyears from the corner.
It depends on the local law in your jurisdiction, and on whether or not there is a sign prohibiting it.
Added: Even with no signs posted, in most (all?) states there is a certain legal minimum distance stated in the traffic laws that indicate how far you must park away from a corner. This is mainly for the driver's visibility of pedestrians wishing to cross and their view of intersecting traffic. In many states this distance is no closer than 25 feet. Signs are not necessary, as this is one of the things that as a licensed driver in your state, you are expected to KNOW.
There is no uneversal answer to this - it varies by jurisdiction and local law - a good safe estimate is at least 25 feet.
Answer 1- United Kingdom
Rule 243 Highway Code:
Opposite or within 10 metres (32 feet) of a junction, except in an authorised parking space.
The distance you may legally park from an intersection is set locally and there is no generally applicable nationwide answer to this question. You would have to ask locally.
6 feet
ten feet
6 feet
10 feet
Depends on the size of the fire. I will park as far away as I could.
You can park as far away as you want. However you should never park closer than 10 feet.
Enko is at the far left corner of pukapooka beach. Past the fishing holes and through the water on the far bottom corner.
You must park 5 feet away from a driveway.
about an hour and 15 minutes
30 feet
30ft
Within one foot.
20 ft
Zion National Park is in the South West corner of Utah, not far from St George.