English: The Belhaven and Stenton Mausoleum. The photograph was taken from the Clyde Walkway, a long-distance footpath. This section is prone to flooding (compare
1605634); there is an alternative seasonal route which bypasses it.
However, the pool visible in the foreground is permanent, and is shown on the map.
The structure in the distance is the Belhaven and Stenton Mausoleum. It stands in an old cemetery which was associated with the ancient parish church of Cambusnethan, founded in the eighth century; the cemetery fell into disuse in the seventeenth century (see http://hsewsf.sedsh.gov.uk/hslive/portal.hsstart?P_HBNUM=64 for details).
The mausoleum is dedicated to Lord Belhaven and Stenton (1793-1868); see http://hsewsf.sedsh.gov.uk/hslive/portal.hsstart?P_HBNUM=672 for architectural and other details. Specifically, the mausoleum was created for Robert Montgomery Hamilton, 8th Lord Belhaven and Stenton (the "Mortimer" at the last-cited link seems to be a typo for "Montgomery").
He was one of the representative peers of Scotland from 1819 to 1832, and appears in the list that is given on Leigh Rayment's site:
http://www.leighrayment.com/ (follow the "Representative Peers – Scotland" link from that page to see the list; the term "representative peers" is explained there).