Stonehenge prehistoric monument
Booking in advance is recommended: Stonehenge Booking. To avoid the busier times book either the first slot (9:00 AM in summer / 9:30 in winter) or the very last slot (different times depending on the season). Additionally, try to avoid weekends.
Best light for photos is in the morning. Another way to avoid crowds is booking a private sunset tour, where you could even take stunning golden hour shots.
With an age of 4000 to 5000 years, it has an immense cultural value. Many visitors are present year round. The site is located directly at the A303, thus it is very easy to reach. There is a path around the complete monument, and you are not allowed to get in direct touch with the stones. Therefore you will always have a good view of the monument and may get good pictures.