1. Mercado de San Telmo is a historic marketplace located in the heart of Buenos Aires’ San Telmo district. It was originally built in the late 19th century, and underwent a major renovation in the early 2000s. The market contains a wide variety of vendors selling everything from fresh produce and meats to antiques, jewelry, and souvenirs. There are also several cafes and restaurants, as well as live music performances on weekends.

Some interesting facts about Mercado de San Telmo include:

- The building was originally constructed as a wholesale fruit and vegetable market, and was one of the largest of its kind in Latin America at the time.

- The market and its surrounding neighborhood are known for their bohemian and artistic vibe, and have long been popular with tourists and locals alike.

- The market has been featured in several Argentine films and television shows, including the popular crime drama \"El Marginal.\"

2. The market is open daily from 10am to 7pm (although some vendors may close earlier), and can be reached by phone at +54 11 4342-0604.

3. There is no admission fee to enter the market, although some individual vendors may charge for their products or services. The market is easily accessible by public transportation, with several bus lines and the Subway Line C stopping nearby. Taxis and ride-sharing services are also readily available in the area.