diff --git a/src/components/Map/markerManager.js b/src/components/Map/markerManager.js
index fd90ea7..3b85a53 100644
--- a/src/components/Map/markerManager.js
+++ b/src/components/Map/markerManager.js
@@ -235,14 +235,50 @@ function applyPostDetails(modalWrap, post) {
   const summaryEl = modalWrap.querySelector(".sw-modal-summary");
   if (summaryEl) summaryEl.textContent = summary;
 
+  const heroGallery = collectGalleryImages(post);
+  const heroImageSrc = heroGallery[0] || heroImageForPost(post);
+  const heroFullSrc = heroGallery[0] || fullImageForPost(post);
+  const heroHasGallery = heroGallery.length > 1;
   const hero = modalWrap.querySelector(".sw-modal-hero");
   const clusterHero = modalWrap.querySelector(".sw-cluster-hero-media");
   if (hero || clusterHero) {
     const target = hero || clusterHero;
-    target.innerHTML = img
-      ? `<img src="${escapeHtml(img)}" data-fullsrc="${escapeHtml(fullImg)}" alt="" loading="lazy" />`
+    const heroImageHtml = heroImageSrc
+      ? `<img src="${escapeHtml(heroImageSrc)}" data-fullsrc="${escapeHtml(heroFullSrc)}" alt="" loading="lazy" data-gallery-index="0" />`
       : `<div class="sw-modal-hero-fallback"><div class="sw-modal-hero-fallback-inner"><i class="${categoryIconClass(post)}"></i><span>${escapeHtml(normCatLabel(post))}</span></div></div>`;
+    const arrowHtml = heroHasGallery
+      ? `<button class="sw-modal-hero-arrow left" type="button" aria-label="Previous image"><i class="fa-solid fa-chevron-left" /></button><button class="sw-modal-hero-arrow right" type="button" aria-label="Next image"><i class="fa-solid fa-chevron-right" /></button>`
+      : "";
+    target.innerHTML = `${heroImageHtml}${arrowHtml}`;
+    let galleryRow = modalWrap.querySelector(".sw-modal-gallery-row");
+    if (heroHasGallery) {
+      if (!galleryRow) {
+        galleryRow = document.createElement("div");
+        galleryRow.className = "sw-modal-gallery-row";
+        const heroRow = target.closest(".sw-modal-hero-row");
+        const parent = heroRow?.parentNode || target.parentNode || modalWrap;
+        if (parent) {
+          parent.insertBefore(galleryRow, heroRow ? heroRow.nextSibling : target.nextSibling || null);
+        } else {
+          modalWrap.appendChild(galleryRow);
+        }
+      }
+      galleryRow.innerHTML = heroGallery
+        .map(
+          (url, idx) =>
+            `<button type="button" class="sw-modal-gallery-thumb${idx === 0 ? " active" : ""}" data-index="${idx}"><img src="${escapeHtml(
+              url
+            )}" alt="" loading="lazy" /></button>`
+        )
+        .join("");
+    } else if (galleryRow) {
+      galleryRow.remove();
+      galleryRow = null;
+    }
     bindHeroLightbox(modalWrap);
+    if (heroHasGallery) {
+      initModalGallery(modalWrap, heroGallery);
+    }
   }
 
   const badge = modalWrap.querySelector(".sw-modal-badge");
@@ -447,6 +483,44 @@ function bindHeroLightbox(modalWrap) {
   });
 }
 
+function initModalGallery(modalWrap, gallery) {
+  if (!modalWrap || !Array.isArray(gallery) || gallery.length === 0) return;
+  const heroImg = modalWrap.querySelector(".sw-modal-hero img, .sw-cluster-hero-media img");
+  if (!heroImg) return;
+  let activeIndex = 0;
+  const thumbButtons = modalWrap.querySelectorAll(".sw-modal-gallery-thumb");
+  const arrows = modalWrap.querySelectorAll(".sw-modal-hero-arrow");
+  const setActive = (idx) => {
+    if (!Number.isFinite(idx)) return;
+    const normalized = (idx + gallery.length) % gallery.length;
+    activeIndex = normalized;
+    heroImg.src = gallery[normalized];
+    heroImg.dataset.fullsrc = gallery[normalized];
+    heroImg.dataset.galleryIndex = String(normalized);
+    thumbButtons.forEach((btn) => {
+      const btnIndex = Number(btn.dataset.index);
+      btn.classList.toggle("active", btnIndex === normalized);
+    });
+  };
+  arrows.forEach((btn) => {
+    btn.addEventListener("click", (event) => {
+      event.stopPropagation();
+      const direction = btn.classList.contains("left") ? -1 : 1;
+      const nextIndex = (activeIndex + direction + gallery.length) % gallery.length;
+      setActive(nextIndex);
+    });
+  });
+  thumbButtons.forEach((btn) => {
+    btn.addEventListener("click", (event) => {
+      event.stopPropagation();
+      const idx = Number(btn.dataset.index);
+      if (Number.isNaN(idx)) return;
+      setActive(idx);
+    });
+  });
+  setActive(0);
+}
+
 function openImageLightbox(src) {
   if (!src) return;
   const overlay = document.createElement("div");
@@ -607,6 +681,25 @@ function fullImageForPost(post) {
   return normalizeImageUrl(raw);
 }
 
+function collectGalleryImages(post) {
+  const result = [];
+  const seen = new Set();
+  const add = (value) => {
+    const normalized = normalizeImageUrl(value);
+    if (!normalized) return;
+    if (seen.has(normalized)) return;
+    seen.add(normalized);
+    result.push(normalized);
+  };
+  if (Array.isArray(post?.media_urls)) {
+    post.media_urls.forEach(add);
+  }
+  ["image_large", "image_medium", "image_small", "image", "media_url"].forEach((key) => {
+    add(post?.[key]);
+  });
+  return result;
+}
+
 function formatRelativeTime(createdAt) {
   try {
     if (!createdAt) return "now";
diff --git a/src/styles/mapMarkers.css b/src/styles/mapMarkers.css
index 79f31db..de067f0 100644
--- a/src/styles/mapMarkers.css
+++ b/src/styles/mapMarkers.css
@@ -886,6 +886,65 @@ body[data-theme="blue"] .sw-centered-modal .post-card.sw-expanded-shell{
   display:block;
 }
 
+.sw-modal-hero-media{
+  position:relative;
+}
+.sw-modal-hero-arrow{
+  position:absolute;
+  top:50%;
+  transform:translateY(-50%) scale(0.95);
+  width:36px;
+  height:36px;
+  border-radius:50%;
+  border:1px solid rgba(255,255,255,0.35);
+  background: rgba(0,0,0,0.55);
+  color:#fff;
+  display:flex;
+  align-items:center;
+  justify-content:center;
+  cursor:pointer;
+  z-index:10;
+  transition:transform 0.2s ease;
+}
+.sw-modal-hero-arrow:hover{
+  transform:translateY(-50%) scale(1);
+}
+.sw-modal-hero-arrow.left{
+  left:10px;
+}
+.sw-modal-hero-arrow.right{
+  right:10px;
+}
+.sw-modal-gallery-row{
+  display:flex;
+  gap:0.35rem;
+  overflow-x:auto;
+  padding-top:0.5rem;
+  margin-top:0.5rem;
+}
+.sw-modal-gallery-thumb{
+  border-radius:12px;
+  border:1px solid transparent;
+  width:48px;
+  height:48px;
+  flex:0 0 auto;
+  overflow:hidden;
+  padding:0;
+  display:inline-flex;
+  align-items:center;
+  justify-content:center;
+  background:rgba(15,23,42,0.65);
+}
+.sw-modal-gallery-thumb.active{
+  border-color:rgba(56,189,248,0.95);
+}
+.sw-modal-gallery-thumb img{
+  width:100%;
+  height:100%;
+  object-fit:cover;
+  display:block;
+}
+
 .sw-modal-hero-fallback{
   width:100%;
   height:100%;