I have already built the time machine, the machine is designed to use one-time and then it disappears. There is no way back to the current time.
So think carefully before you choose.
Which part of the world, and what time you want to travel? And why?
You decide to travel to 2135 and say goodbye to the moonmen
You travel to 2017 and meet with an Apple Engineer
You decide to travel back in time to visit a founding father of America