Scythe

The Scythe is a holiday item that was first dropped on 3 June 2013 til 10 June 2013. During the drop, only one scythe would spawn on the ground per world in random pre-set locations all over RuneScape. When picked up, the player would receive a message saying "You have found an untradeable rare item. If you lose it, you can get it back from Diango.". Only one scythe can be picked up per player.

Spawn Locations
For a list of known locations that Scythes have spawned, see below.

Note: Not all of them are accurate.

Thanks to MR CR0W @ RS Forums
 * 1) Falador garden bridge
 * 2) Wizards Tower Basement
 * 3) Mudskipper point
 * 4) Fally party room (upstairs)
 * 5) Romeo and Juliet's House
 * 6) Rimmington House Portal
 * 7) Camelot Flax field
 * 8) Desert Pyramid
 * 9) Barbarian Village Longhall
 * 10) Mining Guild
 * 11) Heroes Guild
 * 12) Zanaris Market Place
 * 13) Catherby Fishing area
 * 14) Edgeville Monastery - Near altar
 * 15) Top floor of games room
 * 16) Varrock Museum
 * 17) Craft Guild
 * 18) Miscellania - Top floor
 * 19) Pollinivinch
 * 20) Fally Sq
 * 21) Mage bank
 * 22) Rogue's Den
 * 23) Agility Pyramid
 * 24) Chaos elemental
 * 25) White knight castle
 * 26) Relleka
 * 27) Karamja - near volcano
 * 28) Zammy mage
 * 29) Near red chins
 * 30) Falador furnace upstairs 2-3 squares before white rug
 * 31) Port Sarim
 * 32) In front of fally bank
 * 33) Ardougne church - upstairs
 * 34) 3~story house in east Falador
 * 35) Void outpost
 * 36) Fally shield shop 2nd floor in-between dressers and mirror
 * 37) Near Sawmill gate
 * 38) Merlin's Crystal
 * 39) Falador bar - 2nd floor
 * 40) Rune ess mines (center)
 * 41) Center of Dark Warriors' Fortress
 * 42) South-east mine in Lumby swamp
 * 43) Slayer Tower - Nechryaels
 * 44) Ardougne Mill
 * 45) Al-Kharid Scim Shop - Upstairs
 * 46) In Opening To The Chicken Farm South of Fally and North of Port Sarim
 * 47) Stagnant water - Braindeath Island
 * 48) Air Obelisk
 * 49) Trollheim Herb Patch
 * 50) Draynor Mansion - Near Ava
 * 51) Lletya altar room spawn. Access requires partial completion of Mourning's Ends Part 1.
 * 52) Fally hair dressers 2nd floor.
 * 53) Piscatoris bank and found my scythe lying in the middle of the city.
 * 54) Middle of nardah, next to a tree (vague needs clarification)
 * 55) Wizards tower (again) outside wall southeast corner where the rune ess telporter mage is (2 locations near each other in tower basement)
 * 56) Possible 2nd location of fally 2nd floor furnace after the rug behind a stool
 * 57) Edgeville dungeon lvl 7 earth warriors
 * 58) South west of lumby swamp dung entrance.
 * 59) 2nd Floor Shield Shop Near the Bed and Screen
 * 60) Hellhounds inside of the Family Crest dungeon east of Ardy
 * 61) Axe House up near MB
 * 62) Feldip Hills, 3 spaces west of the fairy ring towards the mining icon
 * 63) Bear cages behind varrock castle, enter from Varrock sewer
 * 64) Upstairs besides Hazelmere (on the peninsula east of Yanille)
 * 65) Outside the body alter on the east side
 * 66) Alkharid Scim Shop - Upstairs
 * 67) Mage Training Arena
 * 68) Lumbridge Castle Wall - Upstairs
 * 69) Legends Guild - At quest start
 * 70) Bandit Camp - Southeast of General Store
 * 71) Ectofunctus (Upstairs)
 * 72) One space east, one space north of Rimmington general store
 * 73) Canifis general store
 * 74) Ground Zero (New York City)