Unstan Chambered Cairn
This intriguing burial chamber lies within a 5,000-year-old grassy mound. Excavations here uncovered a collection of similarly designed pottery bowls, subsequently found in other Orcadian Neolithic tombs. Access to the tomb by trolley can be awkward for those with mobility problems. Unstan Chambered Cairn is located 2½ miles northeast of Stromness center; it's walkable in about an hour, or you can take the X1 bus.