Something odd and glowing in the centre, perhaps - something apparently out of place, say? Or maybe an odd animal that doesn't scare off as the players approach? Or perhaps some kind of offering - old flowers, oddly tied rags, something unusual made of sticks, a symbol of some kind? Important places often attract small tokens being left in profusion (someone starts and everyone else copies) in the real-world, so maybe something similar here might work - try looking up "clootie well" online, for more ideas.

I forgot to mention this the other day, but you might have also tried the Jon Roberts Dungeon style mushrooms (among the "Cave" symbols for that style), as they look quite similar to the standing stones as you currently have them, and some of the single rocks in that style (same catalogue) would work equally as different-look standing stones, as many are elongated along one axis.

Looking at your new ruins (oxymoron alert!), they look a little too uniform in height. You could try moving some to Sheets with different Glow Effects (looks lower than with a shadow) or different length shadows, as you have for some of the standing stones already. You might also add a few smaller areas that are raised above the flatness of some of the current pieces, placed on top of the existing walls; if set on a different Sheet even with similar Effects to the lower ruin walls, they'll help break up that uniform appearance more.

I agree with Sue. The moss looks really good, and yes, keep experimenting!

@Autumn Getty - I'd forgotten your comment about castle maps earlier.

I've rather drawn this one "by-hand" as it were, instead of using some of the shortcut options CC3+ might have provided. The Castle Walls add-on from the Cartographer's Annual for 2010 adds some useful commands for drawing the walls particularly, for instance. I wasn't sure how it might handle some of the variable size crenelations I needed here though, but it would have added fancier doorway and archer-window options than the simple straight cuts I've used, certainly.

If you're intending to draw a lot of castles, you might want to think about the Source Maps: Castles pack too. It is an older system which hasn't been updated for CC3+, and probably won't be now as far as I recall. However, you can use it with the usual DD3, etc., fills and symbols instead of the simpler vector options it comes with (it was designed to the old CC2-Pro standard). Beyond the information in the product pages I've linked to, if you also have the Tome of Ultimate Mapping, there are some additionally helpful discussions and tutorials regarding all the Source Maps products there as well, so you can get a better feel for what it can do for you.

@Vir: There are a number of problems involved in understanding climate and how it would behave in circumstances for another planet than Earth with its current layout of continental landmasses, sizes and depths of ocean.

One is we don't really understand how Earth's climate works. There are a lot of theories and models, but many of them fall apart if we try to use them to explain the current Earth in any detail, and/or if we try to use them to explain what we understand about the geological past (this latter is a particularly major problem).

Another is that because we don't properly understand how our own planet's climate operates, when we try to use these theories and models to explain another planet's (and this has happened repeatedly in our own Solar System), they don't really work either.

So the further we get away from the current physical situation for Earth, the more guesswork is involved, essentially. (And there's a lot of guesswork involved in explaining the current situation already!)

Ocean depths different to Earth's create particular uncertainties, as it's clear there are things happening in Earth's deeper oceans that have huge effects planet-wide, but we don't really know why they happen. So when trying to look at a planet like this one, where great areas of the ocean are much deeper over far larger areas than Earth's, it gets to the point of either giving up, or just going with whatever you fancy!

Ocean currents, for example, can flow in completely different directions at different depths - a warm current might be flowing over or under a cold current behaving in this way too. Similar things happen in the atmosphere as well, so while that shouldn't be a surprise, it doesn't mean we really know why things are as they are.

If you need a south to north wind (maybe only seasonally), my advice would be simply invent what seems to you a good reason for why it happens, and if that involves something relating to Earth's climate/weather patterns, possibly only vaguely, just invoke that. If anybody's daft enough to question it, then obviously it's because it's also influenced by the planet's magical field!

If you need ideas based on what happens for Earth, I'd suggest taking a look at places online such as already suggested above here for the geological situation for Earth that's similar to your own planet, with things like the estimates for broad-scale current flows. If you can find a good-quality physical atlas showing similar things for either the past or present (which is a useful definition for "good quality"), that will be just as suitable, dependent on what you prefer.

I could scarcely let the name pass without comment!

Wasn't familiar with this, but checking around online, I gather Savage Seas was originally a series of linked adventures published in Dragon magazine in 2006-2007 for D&D. It's taken a lot of digging around, but I think the blurry map of the Sea Wyvern you mentioned, and which seems to be that shown online in places, was originally published as a loose poster-sized map in Dungeon #141, so was presumably much clearer that way. Sadly, I don't have a copy of the magazine to confirm, however!

It looks as if there were other ship plans published for some of the other vessels encountered during this campaign, judging by what I chanced-upon online (as low-res images, or simply from comments made), and I did come across what seemed to be an online conversion of the whole campaign to Pathfinder as well, but that seemed to have few images overall - aside from a blurry Sea Wyvern drawing, much as I imagine you were working from.

Nice-looking drawings, by the way!