Colsterdale towers

The Greygarth Monument is also in the area,[5] commemorating Queen Victoria's Diamond Jubilee in 1897.

The sighting towers were erected to conduct surveys (the steep-sided valley of Dallowgill was once a proposed reservoir site) and as references for construction of the pipeline over hill and dale toward Harrogate.

The pipe begins at the bottom of a small catchments reservoir above Spout Gill Farm and flows to Roundhill Reservoir, where it meets with the dam overflow pipe that runs to Carlesmoor and empties into the River Laver.

The Leeds Corporation explored construction of another reservoir to the north-west in Colsterdale but the proposal was rejected due to concerns over lead and coal mines in the area.

The narrow-gauge Colsterdale Waterworks Light Railway built in 1901 as a supply line from Masham to Roundhill Reservoir closed in 1926 and was removed in 1932 (after being used during World War I for troop transport to the Leeds Pals camp at Breary Banks just north of Leighton) but is still evident on the south side of the dale.