diff --git a/data/markers.json b/data/markers.json
index 948e9bb46..9cbfc3164 100644
--- a/data/markers.json
+++ b/data/markers.json
@@ -3919,48 +3919,6 @@
 		"y": 32111,
 		"z": 6
 	},
-	{
-		"description": "",
-		"icon": "down",
-		"x": 33742,
-		"y": 31035,
-		"z": 6
-	},
-	{
-		"description": "",
-		"icon": "down",
-		"x": 33756,
-		"y": 31042,
-		"z": 6
-	},
-	{
-		"description": "",
-		"icon": "up",
-		"x": 33774,
-		"y": 31036,
-		"z": 6
-	},
-	{
-		"description": "",
-		"icon": "down",
-		"x": 33783,
-		"y": 31041,
-		"z": 6
-	},
-	{
-		"description": "",
-		"icon": "down",
-		"x": 33800,
-		"y": 31012,
-		"z": 6
-	},
-	{
-		"description": "",
-		"icon": "down",
-		"x": 33817,
-		"y": 31021,
-		"z": 6
-	},
 	{
 		"description": "",
 		"icon": "up",
@@ -3968,13 +3926,6 @@
 		"y": 31658,
 		"z": 6
 	},
-	{
-		"description": "",
-		"icon": "down",
-		"x": 33835,
-		"y": 31011,
-		"z": 6
-	},
 	{
 		"description": "Furious Crater",
 		"icon": "crossmark",
@@ -11304,13 +11255,6 @@
 		"y": 32376,
 		"z": 7
 	},
-	{
-		"description": "Boat to Svargrond",
-		"icon": "flag",
-		"x": 33719,
-		"y": 31105,
-		"z": 7
-	},
 	{
 		"description": "Message in a bottle",
 		"icon": "crossmark",
@@ -11325,13 +11269,6 @@
 		"y": 31639,
 		"z": 7
 	},
-	{
-		"description": "",
-		"icon": "checkmark",
-		"x": 33730,
-		"y": 31040,
-		"z": 7
-	},
 	{
 		"description": "To NPC A Goblin Exile",
 		"icon": "down",
@@ -11339,41 +11276,6 @@
 		"y": 31733,
 		"z": 7
 	},
-	{
-		"description": "",
-		"icon": "down",
-		"x": 33745,
-		"y": 31063,
-		"z": 7
-	},
-	{
-		"description": "",
-		"icon": "checkmark",
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-		"y": 31021,
-		"z": 7
-	},
-	{
-		"description": "",
-		"icon": "up",
-		"x": 33756,
-		"y": 31042,
-		"z": 7
-	},
-	{
-		"description": "",
-		"icon": "checkmark",
-		"x": 33776,
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-		"z": 7
-	},
-	{
-		"description": "",
-		"icon": "checkmark",
-		"x": 33776,
-		"y": 31043,
-		"z": 7
-	},
 	{
 		"description": "",
 		"icon": "down",
@@ -11381,13 +11283,6 @@
 		"y": 31600,
 		"z": 7
 	},
-	{
-		"description": "",
-		"icon": "checkmark",
-		"x": 33790,
-		"y": 31061,
-		"z": 7
-	},
 	{
 		"description": "Xogixath",
 		"icon": "red down",
@@ -11430,20 +11325,6 @@
 		"y": 31551,
 		"z": 7
 	},
-	{
-		"description": "",
-		"icon": "checkmark",
-		"x": 33798,
-		"y": 31006,
-		"z": 7
-	},
-	{
-		"description": "",
-		"icon": "up",
-		"x": 33800,
-		"y": 31012,
-		"z": 7
-	},
 	{
 		"description": "",
 		"icon": "up",
@@ -11465,20 +11346,6 @@
 		"y": 31648,
 		"z": 7
 	},
-	{
-		"description": "",
-		"icon": "up",
-		"x": 33817,
-		"y": 31021,
-		"z": 7
-	},
-	{
-		"description": "",
-		"icon": "checkmark",
-		"x": 33818,
-		"y": 31095,
-		"z": 7
-	},
 	{
 		"description": "",
 		"icon": "up",
@@ -11486,13 +11353,6 @@
 		"y": 31680,
 		"z": 7
 	},
-	{
-		"description": "",
-		"icon": "up",
-		"x": 33835,
-		"y": 31011,
-		"z": 7
-	},
 	{
 		"description": "",
 		"icon": "up",
@@ -14461,13 +14321,6 @@
 		"y": 31733,
 		"z": 8
 	},
-	{
-		"description": "",
-		"icon": "up",
-		"x": 33745,
-		"y": 31063,
-		"z": 8
-	},
 	{
 		"description": "",
 		"icon": "checkmark",
@@ -14482,20 +14335,6 @@
 		"y": 31625,
 		"z": 8
 	},
-	{
-		"description": "",
-		"icon": "down",
-		"x": 33773,
-		"y": 31016,
-		"z": 8
-	},
-	{
-		"description": "",
-		"icon": "down",
-		"x": 33789,
-		"y": 31022,
-		"z": 8
-	},
 	{
 		"description": "",
 		"icon": "up",
@@ -17212,27 +17051,6 @@
 		"y": 31985,
 		"z": 9
 	},
-	{
-		"description": "",
-		"icon": "flag",
-		"x": 33752,
-		"y": 31083,
-		"z": 9
-	},
-	{
-		"description": "",
-		"icon": "up",
-		"x": 33786,
-		"y": 31024,
-		"z": 9
-	},
-	{
-		"description": "",
-		"icon": "up",
-		"x": 33789,
-		"y": 31023,
-		"z": 9
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 	{
 		"description": "",
 		"icon": "down",
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diff --git a/extra/percht-island/markers.json b/extra/percht-island/markers.json
new file mode 100644
index 000000000..d57fb290c
--- /dev/null
+++ b/extra/percht-island/markers.json
@@ -0,0 +1,184 @@
+[
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+		"icon": "down",
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+		"y": 31035,
+		"z": 6
+	},
+	{
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+	{
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+		"icon": "flag",
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+	{
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+	}
+]
diff --git a/scripts/move-to-extra.js b/scripts/move-to-extra.js
index 2aeee18a8..9d3a38084 100644
--- a/scripts/move-to-extra.js
+++ b/scripts/move-to-extra.js
@@ -3,9 +3,29 @@ const path = require('path');
 
 const sortMarkers = require('tibia-maps/src/sort-markers.js');
 
-// TODO: Make these command-line parameters, in case that’s useful (?).
-const DESCRIPTION = 'Ice flower';
-const SPECIAL_ID = 'achievements';
+const SPECIAL_ID = 'percht-island';
+
+const isSpecial = (marker) => {
+	//return marker.description === 'Ice flower';
+	// https://tibiamaps.io/map#33686,30971,9:1
+	const TOP_LEFT_COORDINATE = { x: 33686, y: 30971 };
+	// https://tibiamaps.io/map#33862,31136,9:1
+	const BOTTOM_RIGHT_COORDINATE = { x: 33862, y: 31136 };
+	const HIGHEST_FLOOR = 1;
+	const LOWEST_FLOOR = 9;
+	const isWithinX = (
+		marker.x >= TOP_LEFT_COORDINATE.x &&
+		marker.x <= BOTTOM_RIGHT_COORDINATE.x
+	);
+	const isWithinY = (
+		marker.y >= TOP_LEFT_COORDINATE.y &&
+		marker.y <= BOTTOM_RIGHT_COORDINATE.y
+	);
+	const isWithinZ = (
+		marker.z >= HIGHEST_FLOOR && marker.z <= LOWEST_FLOOR
+	);
+	return isWithinX && isWithinY && isWithinZ;
+};
 
 const readJSON = (filePath) => {
 	const absolutePath = path.resolve(__dirname, filePath);
@@ -36,7 +56,7 @@ const specials = [];
 const rest = [];
 const oldMarkers = readJSON('../data/markers.json');
 for (const oldMarker of oldMarkers) {
-	if (oldMarker.description === DESCRIPTION) {
+	if (isSpecial(oldMarker)) {
 		specials.push(oldMarker);
 	} else {
 		rest.push(oldMarker);