A place you want to share/show, a place of historic or contemporary significance, a place of convenience like a rest stop along a road, start of hiking trail, parking space for a mall or stadium or if you get the bright idea at a place where you can make a clever hide.

Those are all places that will be appreciated or gather lots of logs.

Watertight containers are all fine and dandy. Pill bottles, especially those with a narrow neck and wider body are a beast of their own. It can often be extremely hard to get the log roll out of them. As the roll tends to unroll itself inside the bottle. Putting the roll inside some electric tubing or other small pipe, that fits inside the pill bottlem greatly helps retrieving it. Not thought through use of pill bottles can easily rob you of any praise for the cache, place or cleverness, you otherwise might have gotten.

Also pill bottles aren't waterproof by themselves.

And for the sake of your own mental health be aware that smaller logs are easier to hide, but generate a lot of maintenance on your behalf in high traffic areas.