Aerial of Llyn Llydaw Mount Snowdon Wales with hikers on mountain top

llyn llydaw mount snowdon snowdonia national park wales snowdonia yr wyddfa parc cenedlaethol eryri hiking mountain peak sunny day gwynedd caernarfonshire national three peaks challenge brittany lake gwyddfa rhita alpine topography alpine terrain glaciation uk united kingdom miners track pen y pass summit mountain top mountain summit landscape highest mountain nature adventure national nature reserve aerial moutain lake alpine lake view welsh causeway lake causeway treeless national park wild camping backpacking british isles climbing two hikers men hikers male