1. Greenwich is a historic and picturesque area of London, located in the southeast of the city. It is famous for its maritime heritage, with the Royal Observatory and National Maritime Museum located here. Visitors can also explore the Cutty Sark, a 19th-century tea clipper ship that has been renovated and turned into a museum. Other interesting sights include the Painted Hall in the Old Royal Naval College and the Greenwich Market, where you can find food, crafts, and antiques. The area is also known for its stunning views of the London skyline, and is a popular spot for picnics, walks, and bike rides.

2. The working times of the various attractions in Greenwich vary, so it’s best to check their individual websites for up-to-date information. The Royal Observatory is open daily from 10am to 5pm, with last entry at 4.30pm. The National Maritime Museum is open daily from 10am to 5pm, and the Cutty Sark is open daily from 10am to 5pm. The Old Royal Naval College is open daily from 10am to 5pm.

3. Transportation to Greenwich is easy thanks to good transport links. The closest train station is Greenwich Station, which is served by Southeastern trains. The DLR also has a station at Greenwich, called Cutty Sark. There are also several bus routes that serve the area. Tickets for the various attractions in Greenwich can be purchased online or at the entrance to each attraction. Additionally, the attractions offer combination tickets if you want to visit multiple sights.