Puerto Rico does not have a single city, but rather many cities and municipalities within the territory. Some of the largest and most well-known cities in Puerto Rico include:
1. San Juan - The capital and largest city of Puerto Rico, known for its historic Old San Juan district, beautiful beaches, and vibrant nightlife.
2. Bayamón - Located just west of San Juan, it is the second-largest city in Puerto Rico and an important industrial and commercial center.
3. Carolina - Situated on the northeast coast, Carolina is known for its beautiful beaches, resorts, and its proximity to the Luis Muñoz Marín International Airport.
4. Ponce - The second-largest city in Puerto Rico, located in the southern part of the island, known for its rich history, beautiful colonial architecture, and annual Carnival celebrations.
5. Caguas - Situated in the central part of the island, Caguas is known for its cultural attractions, including museums, theaters, and traditional festivals.
6. Mayagüez - Located on the west coast of the island, Mayagüez is known for its historic architecture, vibrant downtown area, and its importance as an educational and commercial hub.
7. Arecibo - Known for its world-famous Arecibo Observatory, this city on the north coast of the island offers a mix of beautiful beaches, caves, and natural beauty.
These are just a few examples, as Puerto Rico is divided into 78 municipalities, each with its own distinct character and attractions.