So, I made this about a year ago (before I was on PMC) and I figured I would upload it here.

It's a TARDIS-like device (inspired by Doctor Who). It uses command blocks to seem bigger on the inside, and can go to 8 different locations (including inside itself) and 2 different times. There's also an emergency transport feature.

You'll want the render distance set to at least 16 chunks for it to load smoothly.

This was the 6th TARDIS I made; I'll also upload the 8th version (not as good at going to different locations, but way better at the bigger on the inside effect).
www.planetminecraft.com/project/yosho-tardis-mark-viii/