Tom Ackroyd:
Standing stone
Tom Ackroyd:
Obelisk, with south celestial pole viewer
Tom Ackroyd:
Analemma, showing real solar noon at 12.17 NZST
Tom Ackroyd:
Pillar and two lintels
Tom Ackroyd:
Wairarapa shed
Tom Ackroyd:
Woodpile