Sumeru is the nation that worships Lesser Lord Kusanali, the Dendro Archon nd God of Wisdom. It is the city of scholars known for its wisdom. Archon Quest Chapter III takes place in this region. Sumeru has the most number of viewpoints located all around compared to other nations in Teyvat. I managed to uncover 44 viewpoints but there could be more.

Entry 1: Avidya Forest: The City Where All Wisdom Resides

This viewpoint is located by the Teleport Waypoint south of Sumeru City and west of Gandharva Ville.

Entry 2: Gandharva Ville: The City Above the Forest

Entry 3: Vimara Village: The Village by the River

This viewpoint will only appear after completing The World of Aranara quest.  You won’t see this entry in the Archive until it’s collected.

Entry 4: Ardravi Valley: The Harbor Betwixt the Two Trees

Entry 5: Lokapala Jungle: Memory of Alcazarzaray

Entry 6: Pardis Dhyai: The Garden of Deep Thought

Entry 7: Caravan Ribat: The Frontier Beneath the High Wall

Entry 8: Devantaka Mountain: The Colossus Watching Devantaka

Entry 9: Apam Woods: Varunastra

Entry 10: The Rain’s End: The Rain’s End

Entry 11: Vanarana: The World of the Aranara

Entry 12: Old Vanarana: Nursey of Lost Dreams

Entry 13: Sand-Embraced Home: The Littlest Dream

Entry 14: Land of Grounded Dreams: The Garden’s New Sprouts

Entry 15: Land of Lower Setekh: The Barren Land Where Sand Dances

Entry 16: Land of Lower Setekh: Towers of Betrayal

Entry 17: Refugee Shelters: Aaru Village

Entry 18: Thamud Oasis: Land of Lower Setekh

Entry 19: The Mausoleum of King Deshret: The Mausoleum of King Deshret

Entry 20: The Thousands of Entombed Chambers: Hypostyle Desert

Entry 21: Khaj-Nisut: Eye of the Sands

Entry 22: Duat Hall: The Bottomless Hall

Entry 23: The Mausoleum of King Deshret: Aaru’s Shut

Aaru’s Shut can only be accessed when you do the Dual Evidence quest until the end. If you have done it and would like to go back to this viewpoint,  you can use the Scarlet Sand Slate from the inventory, choose the third option on the left side, then select either Aaru’s Shut or Great Hall of Truths.

Entry 24: Valley of Dahri: The Giant of the Wind-Eroded Valley

Entry 25: Dar al-Shifa: Lifeless Dar al-Shifa

Entry 26: Land of Lower Setekh: Verdant Fields’ Vantage Point

Entry 27: Tanit Camps: Mt. Damavand, Where Sandstorms Never Cease

Entry 28: The Sands of Al-Azif: The Moonblue Canals

Entry 29: Tanit Camps: The Tanit Encampment

Entry 30: Safhe Shatranj: The Palace Abandoned by the Gods

Entry 31: Bayt Al-Muazzam: The Temple of Buried Dominion

Entry 32: Wenut Tunnels: Wenut Tunnels

Entry 33: Apep’s Resort: The Lost Hermitage

Entry 34: Debris of Panjvahe: The Forgotten River Valley

Entry 35: Wadi Al-Majuj: The Gap of the Hidden Ruins

Entry 36: Bayt Al-Sukr: The Court of Dried Springs

Entry 37: Bayt Al-Hayah: The Court of Withered Life

Entry 38: Wounded Shin Valley: Where a Titan’s Shins Were Broken

Entry 39: Liloupar’s Cell: Liloupar’s Gaol

Entry 40: The Orchard of Pairidaeza: The Paradise of Eternal Peace

Entry 41: Hills of Barsom: Elder Pine Atop the Wasters

Entry 42: Hangeh Afrasiyab: Forge of the Abandoned Foundry

Entry 43: Hangeh Afrasiyab: Gate of Everlasting Mourning

Entry 44: Tunigi Hollow: Valley of the Unsullied

Entry  45: Harvisptokhm: Vourukasha Oasis

Entry 46: Chemin Oublie: Sourcewater Nation