The Llŷn Peninsula has a landscape that is quite different
from the rest of Wales. To the south, the low lying pasture
between Pwllheli and Llanbedrog is actually below the high
tide level and has been reclaimed now that the Afon Penrhos
has been diverted into Pwllheli and now drains into the
marina along with the rivers Rhyd-hir and Erch.
Much of Llŷn, however is rolling countryside giving way
occasionally to the odd volcanic hill, such as Yr Eifl and
Garn Fadryn. These hills are part of a line that run from
the northeast, at Bwlch Mawr, southwest to Mynydd Rhiw.
The rolling countryside has allowed a greater proportion of
the land to be used for growing crops than is viable
elsewhere in Wales, and though a fair amount of farmland on
Llŷn is used for grazing it is not so uncommon to see crops
being planted or harvested.