A lot of chests in the world. Even the scraps on the floor.
A full guide :
Timestamps:
00:00 Intro
00:42 Prologue: Got Your Nose Achievement, Simoon Achievement, Just The Two of Us
07:37 Mechanist Mask: Up On High, Glider on the Storm, Ceiling Of Stars Achievements
20:19 Beetle Mask: Nesting Giant, A Hard Place, Badge Hobbyist, Squeeze One Out, Many Different Faces Achievements
25:29 Guard Mask: Fragile Goods, Power to the People, Take That!, Badge Collector
35:13 Climber Mask
42:01 Entertainer's Mask
44:47 Making Money
45:58 The Dunboyne Achievement (Amateur Historian P1)
47:27 Balfron Connection Achievement(Amateur Historian P2)
49:26 Rowleys Way Achievement (Amateur Historian P3)
51:48 Shadow of Neave Achievement (Amateur Historian P4)
53:43 Center of Brunswick Achievement (Amateur Historian P5)
55:19 Trellick's Pillar Achievement (Amateur Historian P6)
57:40 Amateur Historian Achievement ( Historical Reconnection Quest)
58:48 Scrapper Mask
59:15 Cartographer Mask
59:48 Merchant Mask
1:01:05 Wrapping Up, Playing Dress Up Achievements
1:02:15 Bike Collector, Bike Aficiando Achievements
1:04:15 Under the Hood, Bikes Don't Fly Achievements
1:05:20 Smoked Out Achievement
1:06:28 Not That Kind Of Gliding Achievement
1:06:42 The Gift of Gab, Silver-Tongued Sable Achievements
1:07:03 More Than a Box of Sand, Treasure Tracker Achievements
1:07:47 Sticky Paws, Bubble Up, Big Spender, Dune Racer
1:08:23 Thread the Needle, The Quick and the Curious (Ancient Race Quest)
1:11:35 Gastric Bypass Achievement
1:12:36 Chum Eggs ( Chum Novice, Honorary Chum, Chum Expert Achievements)
1:34:27 Outro + The Gliding Achievement