San Diego is a vibrant and lively city with a variety of popular attractions to visit. Some of the most popular places to visit in San Diego include:

1. The San Diego Zoo: The San Diego Zoo is a world-famous zoo located in San Diego, California, United States. It is home to more than 3,700 animals of more than 650 species and subspecies, many of which are endangered or threatened. The zoo is known for its conservation efforts and naturalistic animal habitats, which replicate the animals’ native environments as closely as possible. The San Diego Zoo is also home to a number of educational programs and activities, including guided tours, animal encounters, and special events. It is a popular tourist destination and attracts millions of visitors each year.
2. Balboa Park: Balboa Park is a public park located in San Diego, California. It is a popular destination for locals and tourists alike, and is known for its beautiful gardens, diverse museums, and cultural attractions. The park covers 1,200 acres and is home to over 17 museums, several performing arts venues, and numerous gardens, trails, and recreational areas. Some of the notable museums in the park include the San Diego Museum of Art, the San Diego Natural History Museum, and the San Diego Air & Space Museum. The park also has several gardens, including the Japanese Friendship Garden, the Cactus Garden, and the Rose Garden. In addition to its cultural and recreational offerings, Balboa Park is also home to the San Diego Zoo, one of the largest and most well-known zoos in the world.
3. Old Town: Old Town refers to a historic or traditional part of a city or town, often located in the center or near the original or founding location of the settlement. Old Towns are often characterized by their narrow, winding streets and historic buildings, which may include homes, churches, and other structures dating back hundreds of years. Many Old Towns are popular tourist destinations due to their historical significance and cultural charm. Some examples of famous Old Towns include the Old Town in Prague, Czech Republic; the Old Town in Edinburgh, Scotland; and the Old Town in Alexandria, Virginia, United States.
4. Seaport Village: Seaport Village is a waterfront shopping and dining complex located in downtown San Diego, California. It features a collection of boutiques, restaurants, and entertainment options, as well as a number of waterfront parks and walkways. The complex is located on the waterfront, near the San Diego Bay, and is designed to resemble a New England fishing village. Seaport Village is a popular destination for both tourists and local residents, and it offers a variety of activities and events throughout the year, including live music, children’s activities, and holiday celebrations.
5. Coronado Beach: Coronado Beach is a public beach located on the Pacific Ocean in the city of Coronado, California, just outside of San Diego. It is known for its wide, sandy shoreline, warm water temperatures, and beautiful views of the San Diego skyline. The beach is popular for swimming, sunbathing, and surfing, and is also a great spot for beachcombing and watching the sunset.
   
   There are several amenities available at Coronado Beach, including restrooms, showers, and lifeguard stations. There are also several restaurants and shops nearby, as well as a number of hotels and vacation rentals. The beach is easily accessible by car, bike, or public transportation, and there is plenty of parking available.
6. USS Midway Museum: The USS Midway Museum is a museum located in San Diego, California, on the waterfront of downtown San Diego. It is housed in the former aircraft carrier USS Midway, which was commissioned in 1945 and served until 1992. The museum opened to the public in 2004 and has since become a popular tourist attraction in the San Diego area.

Visitors to the USS Midway Museum can explore the various areas of the aircraft carrier, including the flight deck, hanger bay, and crew’s quarters. The museum features a collection of historic aircraft and exhibits on the history of the Midway and the role it played in military conflicts including the Vietnam War and the Gulf War. The museum also offers guided tours and educational programs for school groups.

The USS Midway Museum is open every day of the year except for Thanksgiving and Christmas Day. It is a popular destination for both tourists and local residents and is a great way to learn about the history of naval aviation and the role of aircraft carriers in modern warfare.

1. Gaslamp Quarter: The Gaslamp Quarter is a historic neighborhood in downtown San Diego, California. It is named after the gas lamps that were once used to light the area, which were replaced by electric streetlights in the late 19th century. The Gaslamp Quarter is known for its Victorian-style architecture, lively nightlife, and diverse dining and shopping options. It is a popular destination for tourists and locals alike, with a variety of events and activities taking place year-round. Some of the notable landmarks in the Gaslamp Quarter include the historic Horton Grand Hotel, the Gaslamp Quarter Museum, and the Lyceum Theater. The area is also home to Petco Park, the baseball stadium for the San Diego Padres.

These are just a few of the many popular places to visit in San Diego. There are many other attractions and activities to enjoy in the city, including hiking and biking trails, golf courses, and sporting events.