What country expanded its empire the most during age of discovery?

During the Age of Discovery, Spain expanded its empire significantly, becoming one of the foremost colonial powers of the era. Following Christopher Columbus's voyages in the late 15th century, Spain established vast territories in the Americas, including large parts of South America, Central America, and the Caribbean. The conquest of the Aztec and Inca empires further solidified Spain's dominance, leading to immense wealth and influence in Europe and beyond.