The location itself is a secret and it's secure. IF her location were to be discovered, they would be short and need to be able to conduct a quick extraction for relocation.
Additionally; they needed a way to lower the large and heavy sarcophagus into the Mercury safely.
Nick Morton, Dr. Jekyll and Mr. Hyde, Jenny Halsey, Mummy, Chris Vail, Archaeologist, and Sutekh
What is the plot of The Mummy?
An ancient Egyptian princess is awakened from her crypt beneath the desert, bringing with her malevolence grown over millennia and terrors that defy human comprehension.
What was the budget for The Mummy?
$125 million
How much did The Mummy earn at the worldwide box office?