'H.R.H. the Prince of Wales studying the geysers at Whakarewarewa, the wonderland of New Zealand' 1904*
by Stereoscopic Society of New Zealand 2021-11-24 03:39
Cleaned up and colourised (Photoshop and/or AI websites).
Underwood & Underwood 1904
*Incorrect infomation - the Prince of Wales didn't visit till 1920.
I'd say it's the Duke and Duchess of Cornwall and York on their visit to Rotorua in 1901.
Original can be found at Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA
You can ‘freeview’ this picture - glasses free 3D. Click on the image and select ‘cross view’. Here’s a quick how-to: https://www.newzealand3d.net/newbies-page.