Got a football pitch near you?? You can do 'suicides' on there.
Start at one of the goals,
run to the 6 yard line and back,
run to the 18 yard line and back,
run to half way and back
run the full length and back.
Repeat X times until you're spent.
You can also mix this up with sprints, like HIIT. For example.
run to the 6 yard line and back,
sprint to the 18 yard line and back,
run half way and back,
sprint the full length of the pitch and jog back.
The idea behind this is that it gives you a target, you can see where you are running to and from and you don't need a vast amount of space.
If you haven't got a pitch you could mark out the distances using cones or any other object.