In the Bible, Jesus died and rose again. How long was his body in the grave and where did he go?

Bonus Questions
What is the significance of Jesus being in the grave for three days? (Matthew 12:39-40)
Where did Jesus go after He died? (Luke 23:431 Peter 3:18-20)

Main Thought
Death is a reality for all of us (maybe not Enoch and Elijah!). But, in death, what happens to our body and what happens to that other part of us is something we should consider.