This dike and place is near us. I often visit it by bike. (!/2 hour). Watch the water level. Its a tide creek (Oosterschelde) with a direct connection to the sea.
I can see somebody a good distance in front of you, Ferry. This looks like a great place for biking without having to be on the alert for passing traffic. I wouldn't be afraid to bike here for sure.
We have been away for a few days so I can't comment on all the photos I have missed, but I have checked them out. Will catch up soon