diff --git a/frontend/src/routes/adventures/+page.server.ts b/frontend/src/routes/adventures/+page.server.ts
index c93f27d..dd72f87 100644
--- a/frontend/src/routes/adventures/+page.server.ts
+++ b/frontend/src/routes/adventures/+page.server.ts
@@ -109,7 +109,13 @@ export const actions: Actions = {
 		formDataToSend.append('description', description || '');
 		formDataToSend.append('latitude', latitude || '');
 		formDataToSend.append('longitude', longitude || '');
-		formDataToSend.append('collection', collection || '');
+
+		if (!isNaN(Number(collection))) {
+			if (collection !== null) {
+				formDataToSend.append('collection', collection);
+			}
+		}
+
 		if (activity_types) {
 			// Filter out empty and duplicate activity types, then trim each activity type
 			const cleanedActivityTypes = Array.from(
@@ -129,6 +135,11 @@ export const actions: Actions = {
 		formDataToSend.append('link', link || '');
 		formDataToSend.append('image', image);
 
+		// log each key-value pair in the FormData
+		for (let pair of formDataToSend.entries()) {
+			console.log(pair[0] + ', ' + pair[1]);
+		}
+
 		let auth = event.cookies.get('auth');
 
 		if (!auth) {
diff --git a/frontend/src/routes/map/+page.server.ts b/frontend/src/routes/map/+page.server.ts
index c355bac..af9352b 100644
--- a/frontend/src/routes/map/+page.server.ts
+++ b/frontend/src/routes/map/+page.server.ts
@@ -33,7 +33,8 @@ export const load = (async (event) => {
 					return {
 						lngLat: [adventure.longitude, adventure.latitude] as [number, number],
 						name: adventure.name,
-						type: adventure.type
+						type: adventure.type,
+						collection: adventure.collection
 					};
 				});
 
diff --git a/frontend/src/routes/map/+page.svelte b/frontend/src/routes/map/+page.svelte
index 4cdfd64..ee9d760 100644
--- a/frontend/src/routes/map/+page.svelte
+++ b/frontend/src/routes/map/+page.svelte
@@ -19,6 +19,7 @@
 
 	let showVisited = true;
 	let showPlanned = true;
+	let showCollectionAdventures = false;
 
 	$: {
 		if (!showVisited) {
@@ -33,6 +34,12 @@
 			const plannedMarkers = data.props.markers.filter((marker) => marker.type === 'planned');
 			markers = [...markers, ...plannedMarkers];
 		}
+		if (!showCollectionAdventures) {
+			markers = markers.filter((marker) => marker.collection === null);
+		} else {
+			const collectionMarkers = data.props.markers.filter((marker) => marker.collection !== null);
+			markers = [...markers, ...collectionMarkers];
+		}
 	}
 
 	let newMarker = [];
@@ -117,6 +124,14 @@
 	<span class="label-text">Planned</span>
 	<input type="checkbox" bind:checked={showPlanned} class="checkbox checkbox-primary" />
 </label>
+<label class="label cursor-pointer">
+	<span class="label-text">Collection Adventures</span>
+	<input
+		type="checkbox"
+		bind:checked={showCollectionAdventures}
+		class="checkbox checkbox-primary"
+	/>
+</label>
 
 {#if newMarker.length > 0}
 	<button type="button" class="btn btn-primary mb-2" on:click={() => (createModalOpen = true)}