Final answer:
The apostles returned to Jerusalem from the Mount of Olives, a key site in the Christian faith. The Holy Sepulchre in Jerusalem is particularly important as it is believed to be the location of Jesus' crucifixion and resurrection.
Step-by-step explanation:
The apostles returned to Jerusalem from the hill called the Mount of Olives. This site holds significant importance to Christians and is intricately connected with the events of Jesus' life. When discussing spiritually significant locations in Jerusalem, the Holy Sepulchre is of particular importance. It is revered as the site where Jesus was crucified and resurrected, which lies at the heart of Christian faith. In contrast, the other options, such as Bethlehem, Nazareth, and Jericho, each hold their individual importance in biblical narratives, but they are not the destinations to which the apostles returned after the event stated in the question.