Final answer:
Medellín is the Colombian city known as the city of eternal spring due to its mild climate all year round.
Step-by-step explanation:
The Colombian city that is known as the city of eternal spring is Medellín. Medellín is located in the Aburrá Valley, surrounded by beautiful mountains, and enjoys a mild climate throughout the year. The city's average temperature ranges between 64°F (18°C) and 75°F (24°C), making it feel like spring all year round. This pleasant weather allows for lush greenery, vibrant flowers, and outdoor activities to thrive in Medellín.
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