France is the world capital of roundabouts.
I have no scientific proof for this claim, just personal experience after living and travelling there for over five years.
This country has roundabouts of every style imaginable. But my favorites are those with wonderful gardens of local vegetation including huge trees and shrubs. Others of great interest are displays of local culture and history. Many are worth at least a second trip round in the car to enjoy all that there is to see.
The small Pyrenean country of Andorra has chosen to support local artists by commissioning original works of art for each island.
The possibilities are endless.
I suggest that all Joseph Hébert needs worry about when using a roundabout is to follow the simple rules: always cede to cars approaching from the left when entering and always signal to the right when exiting.
Mas de Viales, France.
(currently staying in Annandale, P.E.I.)