I WONDER - Who Invented Roundabouts?

Roundabouts are not only fun but also serve a crucial role in road safety by slowing down traffic and reducing accidents. The concept was first designed by French architect Pier Leon Font in 1790 for Washington DC. France is home to one of the most famous roundabouts, the Champ Élysées, which is a significant landmark.

What is the name of the famous roundabout in France?

Describe the layout of the Champ releases roundabout.