Observatory
...that the Observatory on Clifton Down in Bristol is likely to have been used as a lookout post since at least the Iron Age?
...that the <b id="mwDq0"><a class="mw-redirect" href="./Observatory,_Bristol" id="mwDq4" rel="mw:WikiLink" title="Observatory, Bristol">Observatory</a></b> <i id="mwDq8">(pictured)</i> on <a href="./Clifton_Down" id="mwDrA" rel="mw:WikiLink" title="Clifton Down">Clifton Down</a> in <a href="./Bristol" id="mwDrE" rel="mw:WikiLink" title="Bristol">Bristol</a> is likely to have been used as a lookout post since at least the <a href="./Iron_Age" id="mwDrI" rel="mw:WikiLink" title="Iron Age">Iron Age</a>?