Oen of the MUST dos in London at least once, this ...

Oen of the MUST dos in London at least once, this place was a joy to explore. We took about 4 hours to feel like we explored enough of the grounds about 85%. We really enjoyed the crown jewels. Truly breathtaking. Tip, arrive before opening to get in line. If you have an e ticket purchased through trip advisor or Get your Guide for example, you'll still need to line up in a separate line to obtain a physical ticket.They don't inform you until you're at the gate so beware. We waited in 3 separate lines before we finally got in to the right one with the right form of ticket. More signage could really avoid this. No photos of the crown jewels allowed but you can stay as long as you like. Again another pro tip, go straight to the crown jewels upon entering as a separate line will form quickly for that building alone.