Cairnpapple

That wee bump on the horizon, not the hut to the left, is the Neolithic and Bronze age site of a henge and small cairn going back to around 3500 BC. Quite small, but significant and a great view of the Forth bridges too (see the extra pic).
The hut is the Historic Scotland visitor centre.

Thought this fits with the WBC theme of Horizons this week.