The cache is placed on the west bank of Midtre Lysedammen, 300 meters above sea-level. From the three Lysedammen ponds the river Tverrelva runs, se below.
/ Cachen ligger ved Midtre Lysedammen, 300 moh. Fra de tre Lysedammene renner Tverrelva ned i Sørkedalen, se nedenfor.
The dam and the pond in spring / vår ved dammen:

Theme 1: The land of 10.000 lakes - no country on earth has such a variety and number of beautiful lakes as Norway /
Tema 1: De 10.000 sjøers land - ingen steder på jorden har så mange vakre tjern og vann som Norge!
These geocaches are placed at Norwegian lakes /
Disse cachene er plassert ved vann og tjern i Norge:
~~ Bygdin, in Jotunheimen: PPJ #58 Camping High
~~ Tverrsjøen, Nordmarka classic: PPJ #06 Tverrsjøen Lake
~~ Fjellsjøen, under Fjellsjøhøgda: PPJ #59 Hills of Oslo, Fjellsjøhøgda
~~ Grimsvatnet, a hidden pearl in Nordmarka: PPJ #62 Grimsvatnet
~~ Vesle Ugla, in Krokskogen: PPJ #36 Vesle Ugla
~~ Steinbutjernet & Øyangen, beneath Øyangsrøysa: PPJ #47 Hill of Border Cairns
~~ Storflåtan, in Krokskogen: PPJ #16 The Twelfth Wheel
~~ Heggelivannene, under Kustein in Krokskogen: PPJ #45 Hills of Oslo, Kustein
~~ Midtre Lysedammen, Sørkedalen jewel: PPJ #27 Midtre Lysedammen
~~ Bjørnsjøen, seen from Kikut: PPJ #33 Hills of Oslo, Kikut
~~ Kobberhaugtjernet, deep into the forest: PPJ #30 Hills of Oslo, Kobberhaugen
~~ Blankvann, in Nordmarka: PPJ #7 Blankvann
~~ Øvresetertjernet, near the tram end station: PPJ #1 Hills of Oslo, Frognerseter
~~ Maridalsvannet, under Grefsenkollen: PPJ #25 Hills of Oslo, Grefsenkollen
~~ Breisjøen, in Lillomarka: PPJ #10 Breisjøen, Lillomarka
~~ Vivangstjernet, in Romeriksåsene: PPJ #5 Swimming high
Theme 2: Waterways of Oslo - creeks and rivers /
Tema 2: Oslos vannveier - bekker og elver
These geocaches are placed along the waterways of Oslo (from west to east and downstream): /
Disse geocacher er plassert ved Oslos vannveier (rekkefølge fra vest til øst og nedstrøms):
~ Heggelielva: PPJ #15 Heggelielva, Gryta
~ Tverrelva: PPJ #27 Midtre Lysedammen
~ Sørkedalselva: gekoh #05: Surka and PPJ #14 Overfloden, river of Oslo
~ Lysakerelva: PPJ #18 Peter's Crossing, Lysakerelva Spilleboksen,
PPJ #43 Wet Arena, SQUAWK#1 The New Bridge at Fåbro
and SQUAWK#2 The Mill Falls of Lysaker
~ Mærradalsbekken: PPJ #26 Sneak Creek
~ Styggedalsbekken and Skådalsbekken: PPJ #22 Twin Creeks
~ Hoffselva: PPJ #19 Court Creek Coming
~ Sognsvannsbekken: PPJ #2 Sognsvannsbekken creek,
HYSSE#19 "Spring Cache" and Xmas #3, many xings
~ Frognerelva: The Park, Beer Corner, NWG # 7 Cold Turkey in Oslo
and PPJ #42 Frognerelva Exit
~ Akerselva: RN#1 Frysja, gekoh #02: Nydalsbakken , PPJ #64 - Twisted,
Drama Behind You, Triple Islands, Jerusalem and the bridge that is not, Olsen Special,
PPJ #23 Borderline North, As Close As You Get, PPJ #44 Aamodt Bru,
AG#24 - Canvas Fall and Akerselva exit
~ Hovinbekken: HYSSE#9 "GreenTrashCache"
~ Alna: Lillomarka Rundt #3 - Alna, AG#17 - The old bridge of Alna,
Alnaparken, AG#23 - Cotton Fall and HYSSE#5 "A RiverDance"
~ Haugerudbekken: AG#8 - Soda creek
~ Østensjøbekken: AG#6 - Silent creek
~ Ljanselva: Rotten Bastard
Seven rivers in Oslo are falling into the Oslo Fjord:
Lysakerelva, Mærradalsbekken, Hoffselva, Frognerelva, Akerselva, Alna and Ljanselva
Tverrelva runs into Heggelielva, which runs into Sørkedalselva at Åmot, 200 meters northeast of the Sørkedalen church.
Sørkedalselva ends in Bogstadvannet lake, from which the river Lysakerelva starts its journey into the Oslo Fjord.
The cache is visible / cachen er synlig.