In the Bible, Jesus died and rose again. How long was he dead and where did he go?

Bonus Questions
What is the significance of Jesus being dead for three days? (1 Corinthians 15:4)
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.