Here is a chart i made for those of us who don't know where to find dungeons
i included locations as well as suggested levels for story and explorable modes
Hope this helps enjoy
Dungeon
Ascalonian Catacombs (Lv30)
Story Mode lv30
Explore Mode lv35
Location Phasmatis Corridor - Plains of Ashford
Caudecus's Manor (Lv40)
Story Mode lv40
Explore Mode lv45
Location Shire of Beetletun - Queensdale
Twilight Arbor (Lv50)
Story Mode lv50
Explore Mode lv55
Location Wychmire Swamp - Caledon Forest
Sorrow's Embrace (Lv60)
Story Mode lv60
Explore Mode lv65
Location Tribulation Rift - Dredgehaunt Cliffs
Citadel of Flame (Lv70)
Story Mode lv70
Explore Mode lv75
Location The Baelfire - Fireheart Rise
Honor of the Waves (Lv76)
Story Mode lv76
Explore Mode lv80
Location Watchful Fjord - Frostgorge Sound
Crucible of Eternity (Lv78)
Story Mode lv78
Explore Mode lv80
Location Infinite Coil Reactor - Mount Maelstrom
The Ruined City of Arah (Lv80)
Story Mode lv80
Explore Mode lv80
Location The Narthex - Cursed Shore
i included locations as well as suggested levels for story and explorable modes
Hope this helps enjoy
Dungeon
Ascalonian Catacombs (Lv30)
Story Mode lv30
Explore Mode lv35
Location Phasmatis Corridor - Plains of Ashford
Caudecus's Manor (Lv40)
Story Mode lv40
Explore Mode lv45
Location Shire of Beetletun - Queensdale
Twilight Arbor (Lv50)
Story Mode lv50
Explore Mode lv55
Location Wychmire Swamp - Caledon Forest
Sorrow's Embrace (Lv60)
Story Mode lv60
Explore Mode lv65
Location Tribulation Rift - Dredgehaunt Cliffs
Citadel of Flame (Lv70)
Story Mode lv70
Explore Mode lv75
Location The Baelfire - Fireheart Rise
Honor of the Waves (Lv76)
Story Mode lv76
Explore Mode lv80
Location Watchful Fjord - Frostgorge Sound
Crucible of Eternity (Lv78)
Story Mode lv78
Explore Mode lv80
Location Infinite Coil Reactor - Mount Maelstrom
The Ruined City of Arah (Lv80)
Story Mode lv80
Explore Mode lv80
Location The Narthex - Cursed Shore