Final answer:
Queen Hatshepsut sent an expedition to the land of Punt, located near modern Somalia, to gather exotic resources such as plants, animals, metals, and spices, contributing to Egypt's prosperity.
Step-by-step explanation:
The mysterious place that Queen Hatshepsut sent an expedition to during her reign was known as Punt. During the New Kingdom period, specifically under Hatshepsut's rule from 1479 to 1458 BCE, she sent a large fleet into Punt, which is believed to be located on the coastal East Africa near what is now modern Somalia. This strategic and ambitious venture was to collect exotic plants, animals, precious metals, and spices, which were highly prized in ancient Egypt and contributed to its wealth and prosperity. Hatshepsut was known for her monumental building projects, and it was also during her leadership that large quantities of goods began to be imported from sub-Saharan Africa, flowing through trade routes that she and her predecessors had established. Even after her death, and the subsequent attempts by her successor Thutmose III to erase her memory, the monumental buildings like the Temple of Hatshepsut and the massive obelisk at the Temple of Amun-Re remained testimony of her reign and power.