The mighty St. Gallus church from the 17th to 18th century sits enthroned above the city. The church was constructed on a pre-Christian cult site and was redesigned on multiple occasions by the famous baroque master builders of the Bregenz Forest.
The church was built to the site of pre-Romanesque church founded around 450 AD. Irish monks Columbanus and his brother Gallus founded the destroyed church in 610 AD and ordered to rebuild it.
The Broch of Gurness is an Iron Age broch village. Settlement here began sometime between 500 and 200 BC. At the centre of the settlement is a stone tower or broch, which once probably reached a height of around 10 metres. Its interior is divided into sections by upright slabs. The tower features two skins of drystone walls, with stone-floored galleries in between. These are accessed by steps. Stone ledges suggest that there was once an upper storey with a timber floor. The roof would have been thatched, surrounded by a wall walk linked by stairs to the ground floor. The broch features two hearths and a subterranean stone cistern with steps leading down into it. It is thought to have some religious significance, relating to an Iron Age cult of the underground.
The remains of the central tower are up to 3.6 metres high, and the stone walls are up to 4.1 metres thick.