Germany Berg Eltz Castle

You are probably referencing the hike from the Mosel River town of Moselkern to Burg Eltz. The path takes you away from the river and through the forest - not along the river. The hike actually follows a small stream in places and is outlined here.

Also, it's "Burg" Eltz. Berg and Burg tend to be pronounced the same by English speakers, but in German they are different words with different meanings and pronunciations.

"Burg" = castle (pronounced "bwuck", roughly.)
"Berg" = mountain (to pronounce this, say "Beh-uck" but try to do it in just one syllable.

RS Germany, Austria and Switzerland. day 2 of the itinerary.

https://www.ricksteves.com/tours/germany/germany-austria-switzerland-tour

I also noticed that a lot of people think that burg and berg are the same. Many times for example people write Rothenberg instead of Rothenburg. I clicked on this to explain the difference but Ross already did it.

Here is the walking path: https://goo.gl/maps/ZmPx35n2Vw42

See also: https://www.openstreetmap.org/?mlat=50.20507065&mlon=7.33677145029494#map=15/50.1997/7.3520

I also noticed that a lot of people think that burg and berg are the
same. Many times for example people write Rothenberg instead of
Rothenburg. I clicked on this to explain the difference but Ross
already did it.

Nürnberg is the one that throws me -- I remember a Burg more than I remember a Berg.

Also... I notice, too, that people mix up berg/burg, but I don't see that many misspell Russ. :)

The Berg/Burg thing is extremely relevant, as both exist in many cases: Rothenburg and Rothenberg, Freiburg and Freiberg (and I have even heard of people confusing Nürburg and Nürnberg). This really matters when looking up train connections...

A "Burg" is etymologically nothing more than an ablaut form of "Berg" (i.e., a fortified Berg). So let's not be too pedantic - except, of course, when we are dealing with ticket machines.

BTW, my personal favorites are misspellings of place names that give a new, often amusing, meaning, e.g. Wurstburg ("Sausage Castle") for Würzburg.

Another very funny example: Neuschweinstein instead of Neuschwanstein. (Newpigstone vs. Newswanstone).

And, of course, Dusseldorf, or village of fools, versus Düsseldorf, or village on the Düssel river.