Broch of Mousa, Stone defensive tower, ca 100 BC, 44 feet (13 m) high, best-preserved in Europe, Shetland Islands, Scotland

- Image ID: C4FM34
Kevin Schafer / Alamy Stock Photo
Image ID: C4FM34
Broch of Mousa, Stone defensive tower, ca 100 BC, 44 feet (13 m) high, best-preserved in Europe, Shetland Islands, Scotland : Looking up.