Answer:
Europe
The country that is credited with starting the age of exploration is Europe.
The Age of Exploration, which is also called Age of Discovery, began in the early years of fifteenth century until the seventeenth century. In this time, ships from Europe have travelled on all parts of the globe in order to find new routes for trading. During their journey, Europeans plotted the lands they have discovered.
Therefore, the Europeans are the ones who started the exploration.