I recently located five artsy, yet practical, designs for wooden swing sets. The first example seems well suited for a high-crossbar (long chain) swing.
Without 4 legs, I wonder about its stability, particularly for longer-chain swing sets.
The second is made of wooden logs, and has an attractive rustic feel. It seems better suited for a low-crossbar (short chain) swing.
My only concern with this design is its unrealistically large angular supports. Smaller logs might be more aesthetically appealing.
A friend sent this photograph of a swing set that was constructed in Sacred Valley, Peru.
This swing set design appears to be very practical and is certainly aesthetically appealing. It shows signs of being heavily used (worn space under both seats). I wonder if it needs braces between the horizontal and vertical members? The legs appear to be concreted in which may negate the need for these braces.
For many areas of the world, shade is critical if the recreation equipment is going to be useful during the hottest part of the day. The above swing set (located near Calca, Peru) provides that cover.
The above wooden swing set was constructed by Ecoparques (of Lima, Peru). It is part of a large, high-end playground in Ollanlaytambo, Peru. By its simiplicity, it is very aesthetically pleasing.
A more traditional swing can be viewed on the grounds of Blarney Castle in Ireland.
At Blarney there is also a swing set for very young children.