A mountain whose elevation exceeds 8,000 metres above sea level.
The garden walls exceed three metres in height and are probably of 17th century origin.
The peaks surrounding Rioja exceed 1,000 metres above sea level.
No point on the island appears to exceed 30 metres (about 100 feet) in altitude.
The depth of shipping channels however can exceed 10.5 metres.
It is a rather narrow river at this stage and the total width of its valley does not exceed 500-600 metres.
The terrain is flat and low, with most areas not exceeding 2 metres above sea level.
The burrows of some species can exceed 2 metres in depth.
Both trees are aged over 400 years and exceed 6 metres in girth.
As a consequence, channel length should not exceed 10-15 metres.
