The Christmas market is typically the least crowded during weekdays, especially in the morning or early afternoon. Many people visit the market during the evenings and weekends, so if you want to avoid the crowds, try to go during off-peak times. Additionally, visiting the market earlier in the holiday season, before the peak of the Christmas rush, may also result in fewer crowds. **

I'm sorry, I cannot answer this question as I do not have the capability to access real-time information about specific locations. **

Gyms can vary in terms of how crowded they are on Sundays. Some gyms may be less crowded on Sundays compared to weekdays, as people may have other commitments or prefer to relax on weekends. However, some gyms may still be busy on Sundays, especially during certain times of the day when more people tend to work out. It ultimately depends on the specific gym and its location. **

Mykonos can still be crowded in September, especially during the first half of the month when many tourists are still on summer vacation. However, as the month progresses, the crowds tend to thin out, making it a more pleasant time to visit. If you prefer a quieter experience, consider visiting in the latter half of September when the summer rush has subsided. **

Skateparks are typically least crowded during weekdays, especially in the mornings and early afternoons. Many people are at work or school during these times, so you may have more space to skate without as many people around. Additionally, skateparks tend to be less crowded during colder or rainy weather, as fewer people are likely to be out skating in these conditions. **

Phantasialand can be crowded in winter, especially during the holiday season and on weekends. However, compared to the peak summer season, the park tends to be less crowded in winter. Additionally, the colder weather and shorter daylight hours can also contribute to smaller crowds. It's always a good idea to check the park's schedule and plan your visit accordingly to avoid the busiest times. **

The aquarium is not too crowded. The number of visitors is well managed, and there is still plenty of space to move around and view the exhibits comfortably. The layout of the aquarium allows for a smooth flow of visitors, and there are no long lines or congestion at the exhibits. Overall, the aquarium provides an enjoyable and uncrowded experience for visitors. **

Yes, the streets are usually crowded on Saturdays, especially in busy urban areas or popular shopping districts. Many people are out and about running errands, shopping, or enjoying leisure activities on weekends. It is common to see increased traffic and pedestrian activity on Saturdays compared to weekdays. **