diff --git a/paper-api/src/main/java/org/bukkit/Particle.java b/paper-api/src/main/java/org/bukkit/Particle.java
index e3c94a5623..ca6d0eaa9d 100644
--- a/paper-api/src/main/java/org/bukkit/Particle.java
+++ b/paper-api/src/main/java/org/bukkit/Particle.java
@@ -133,9 +133,13 @@ public enum Particle implements Keyed {
     EGG_CRACK("egg_crack"),
     DUST_PLUME("dust_plume"),
     WHITE_SMOKE("white_smoke"),
+    @MinecraftExperimental
     GUST("gust"),
+    @MinecraftExperimental
     GUST_EMITTER("gust_emitter"),
+    @MinecraftExperimental
     GUST_DUST("gust_dust"),
+    @MinecraftExperimental
     TRIAL_SPAWNER_DETECTION("trial_spawner_detection"),
     /**
      * Uses {@link BlockData} as DataType
diff --git a/paper-api/src/main/java/org/bukkit/generator/structure/Structure.java b/paper-api/src/main/java/org/bukkit/generator/structure/Structure.java
index 1a766e6871..65d3d8fd5f 100644
--- a/paper-api/src/main/java/org/bukkit/generator/structure/Structure.java
+++ b/paper-api/src/main/java/org/bukkit/generator/structure/Structure.java
@@ -1,6 +1,7 @@
 package org.bukkit.generator.structure;
 
 import org.bukkit.Keyed;
+import org.bukkit.MinecraftExperimental;
 import org.bukkit.NamespacedKey;
 import org.bukkit.Registry;
 import org.jetbrains.annotations.NotNull;
@@ -47,6 +48,7 @@ public abstract class Structure implements Keyed {
     public static final Structure RUINED_PORTAL_NETHER = getStructure("ruined_portal_nether");
     public static final Structure ANCIENT_CITY = getStructure("ancient_city");
     public static final Structure TRAIL_RUINS = getStructure("trail_ruins");
+    @MinecraftExperimental
     public static final Structure TRIAL_CHAMBERS = getStructure("trial_chambers");
 
     private static Structure getStructure(String name) {
diff --git a/paper-api/src/main/java/org/bukkit/loot/LootTables.java b/paper-api/src/main/java/org/bukkit/loot/LootTables.java
index ddf71b0ee2..d872144441 100644
--- a/paper-api/src/main/java/org/bukkit/loot/LootTables.java
+++ b/paper-api/src/main/java/org/bukkit/loot/LootTables.java
@@ -2,6 +2,7 @@ package org.bukkit.loot;
 
 import org.bukkit.Bukkit;
 import org.bukkit.Keyed;
+import org.bukkit.MinecraftExperimental;
 import org.bukkit.NamespacedKey;
 import org.jetbrains.annotations.NotNull;
 
@@ -33,15 +34,25 @@ public enum LootTables implements Keyed {
     ANCIENT_CITY("chests/ancient_city"),
     ANCIENT_CITY_ICE_BOX("chests/ancient_city_ice_box"),
     RUINED_PORTAL("chests/ruined_portal"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_REWARD("chests/trial_chambers/reward"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_SUPPLY("chests/trial_chambers/supply"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_CORRIDOR("chests/trial_chambers/corridor"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_INTERSECTION("chests/trial_chambers/intersection"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_INTERSECTION_BARREL("chests/trial_chambers/intersection_barrel"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_ENTRANCE("chests/trial_chambers/entrance"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_CORRIDOR_DISPENSER("dispensers/trial_chambers/corridor"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_CHAMBER_DISPENSER("dispensers/trial_chambers/chamber"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_WATER_DISPENSER("dispensers/trial_chambers/water"),
+    @MinecraftExperimental
     TRIAL_CHAMBERS_CORRIDOR_POT("pots/trial_chambers/corridor"),
     SHIPWRECK_MAP("chests/shipwreck_map"),
     SHIPWRECK_SUPPLY("chests/shipwreck_supply"),