What is the Largest Body of Water someone can walk across?

Thought of this while looking at the Markermeer and its shallow waters and wondered how far someone could comfortably walk out to from its shore. No idea if it's possible at the Markermeer specifically but it made me think if there were places you could walk a long distance to through just water. Could be in a sea, lake, river, bay, etc but from point A to point B you always have to be "in" the water without swimming.

https://preview.redd.it/4evyv5emt22e1.png?width=1104&format=png&auto=webp&s=04bc99784ea1df0ad1b7a3cf3e1396cb6f34dcda