I normally don't make request, but this idea is too good for me to just keep locked in my head. If I had the time to create this, then I would delve right into the Creation Kit to make it. However, my time is focused on college right now.
The idea is pretty simple - fast travel from anywhere to a specific point.
A gun or grenade could be used as an activator that initiates the teleport player command.
A marker (craft-able in the settlement mode or player homes) that will act as a sort of hub for the player to be transferred to.
The story involves the Institute, a rogue scientist, and a quest to find the schematics / devices that were created from reverse engineered molecular relay technology, which was stolen years back.