Great option to visit, the Sainte-Chapelle is stunning, I recommend going into each of the glass windows and seeing the art work and the story behind it, fascinating. The Conciergerie is fun, they give you a tablet to do a historic auto guided tour that is really fun.

Whether you’re religious or not, if you want a spiritual experience that will stun you in your tracks, come to Sainte Chapelle. I have never seen stained glass so beautiful and is a place I will never forget. The combined ticket for the castle was also a really interesting excursion. If you like French Revolution history then this is a must do activity.

Great - make sure you're in the right line for Sainte Chapelle (there were lines for no tickets, pre-booked on the hour (i.e 1pm) and pre-booked on the half hour (i.e. 1:30pm). People in the wrong queue were sent to the back of the right queue even with pre-booked tickets! Sainte Chapelle is incredible, my 11 year olds jaw dropped upon entering! The conciergerie is also great especially when using the interactive tablet you can pick up upon entering that suggests a route, showing what it would have looked like through history and how the different areas were used