Shamelessly, this is an idea I took from reddit, but I feel like the people here can be very creative and I was curious what kind of answers would pop up from you all.
You are allowed to set three "waypoints" anywhere in the world between which you can instantly and infinitely teleport. Where do you set them?
1. Only you can use these waypoints, and you must be at a waypoint before choosing which of the other two you would like to travel to.
2. You must first travel to the location by normal means before setting the waypoint. Waypoints are based on a location only and are not attached to an object (they aren't port keys.)
3. You cannot change any of the waypoints once set, though they are automatically adjusted to accommodate obstructions. You won't accidentally die, harm/kill someone, or damage/destroy anything by using a waypoint.
4. Traveling costs no money or energy, and has no negative effect on you or anyone else.
Let's see what you guys got.