diff --git a/assets/locales/en_us.json b/assets/locales/en_us.json
index 011007b..f53c97c 100644
--- a/assets/locales/en_us.json
+++ b/assets/locales/en_us.json
@@ -463,5 +463,6 @@
   "friendAdd": "Add as friend",
   "blockUser": "Block user",
   "unblockUser": "Unblock user",
-  "learnMoreAboutPerson": "Learn more about that person"
+  "learnMoreAboutPerson": "Learn more about that person",
+  "global": "Global"
 }
diff --git a/assets/locales/zh_cn.json b/assets/locales/zh_cn.json
index 7cfc434..1fee706 100644
--- a/assets/locales/zh_cn.json
+++ b/assets/locales/zh_cn.json
@@ -459,5 +459,6 @@
   "friendAdd": "添加好友",
   "blockUser": "屏蔽用户",
   "unblockUser": "解除屏蔽用户",
-  "learnMoreAboutPerson": "了解关于 TA 的更多"
+  "learnMoreAboutPerson": "了解关于 TA 的更多",
+  "global": "全局"
 }
diff --git a/lib/screens/explore.dart b/lib/screens/explore.dart
index 1e58c50..492eeb2 100644
--- a/lib/screens/explore.dart
+++ b/lib/screens/explore.dart
@@ -10,9 +10,9 @@ import 'package:solian/router.dart';
 import 'package:solian/screens/account/notification.dart';
 import 'package:solian/theme.dart';
 import 'package:solian/widgets/account/signin_required_overlay.dart';
-import 'package:solian/widgets/app_bar_title.dart';
 import 'package:solian/widgets/current_state_action.dart';
 import 'package:solian/widgets/app_bar_leading.dart';
+import 'package:solian/widgets/navigation/realm_switcher.dart';
 import 'package:solian/widgets/posts/post_shuffle_swiper.dart';
 import 'package:solian/widgets/posts/post_warped_list.dart';
 
@@ -55,7 +55,6 @@ class _ExploreScreenState extends State<ExploreScreen>
   @override
   Widget build(BuildContext context) {
     final AuthProvider auth = Get.find();
-    final NavigationStateProvider navState = Get.find();
 
     return Material(
       color: Theme.of(context).colorScheme.surface,
@@ -82,8 +81,14 @@ class _ExploreScreenState extends State<ExploreScreen>
           headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
             return [
               SliverAppBar(
-                title: AppBarTitle('explore'.tr),
-                centerTitle: true,
+                flexibleSpace: SizedBox(
+                  height: 48,
+                  child: const Row(
+                    children: [
+                      RealmSwitcher(),
+                    ],
+                  ).paddingSymmetric(horizontal: 8),
+                ).paddingOnly(top: MediaQuery.of(context).padding.top),
                 floating: true,
                 toolbarHeight: AppTheme.toolbarHeight(context),
                 leading: AppBarLeadingButton.adaptive(context),
@@ -114,16 +119,6 @@ class _ExploreScreenState extends State<ExploreScreen>
 
             return Column(
               children: [
-                if (navState.focusedRealm.value != null)
-                  MaterialBanner(
-                    leading: const Icon(Icons.layers),
-                    content: Text(
-                      'postBrowsingIn'.trParams({
-                        'region': '#${navState.focusedRealm.value!.alias}',
-                      }),
-                    ),
-                    actions: const [SizedBox.shrink()],
-                  ),
                 Expanded(
                   child: TabBarView(
                     physics: const NeverScrollableScrollPhysics(),
diff --git a/lib/widgets/account/account_avatar.dart b/lib/widgets/account/account_avatar.dart
index 5c92135..53ad0f5 100644
--- a/lib/widgets/account/account_avatar.dart
+++ b/lib/widgets/account/account_avatar.dart
@@ -7,6 +7,7 @@ class AccountAvatar extends StatelessWidget {
   final Color? bgColor;
   final Color? feColor;
   final double? radius;
+  final Widget? fallbackWidget;
 
   const AccountAvatar({
     super.key,
@@ -14,6 +15,7 @@ class AccountAvatar extends StatelessWidget {
     this.bgColor,
     this.feColor,
     this.radius,
+    this.fallbackWidget,
   });
 
   @override
@@ -35,11 +37,12 @@ class AccountAvatar extends StatelessWidget {
       backgroundColor: bgColor,
       backgroundImage: !isEmpty ? AutoCacheImage.provider(url) : null,
       child: isEmpty
-          ? Icon(
-              Icons.account_circle,
-              size: radius != null ? radius! * 1.2 : 24,
-              color: feColor,
-            )
+          ? (fallbackWidget ??
+              Icon(
+                Icons.account_circle,
+                size: radius != null ? radius! * 1.2 : 24,
+                color: feColor,
+              ))
           : null,
     );
   }
diff --git a/lib/widgets/navigation/realm_switcher.dart b/lib/widgets/navigation/realm_switcher.dart
new file mode 100644
index 0000000..4f0dc48
--- /dev/null
+++ b/lib/widgets/navigation/realm_switcher.dart
@@ -0,0 +1,86 @@
+import 'package:dropdown_button2/dropdown_button2.dart';
+import 'package:flutter/material.dart';
+import 'package:gap/gap.dart';
+import 'package:get/get.dart';
+import 'package:solian/models/realm.dart';
+import 'package:solian/providers/content/realm.dart';
+import 'package:solian/providers/navigation.dart';
+import 'package:solian/widgets/account/account_avatar.dart';
+
+class RealmSwitcher extends StatelessWidget {
+  const RealmSwitcher({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final realms = Get.find<RealmProvider>();
+    final navState = Get.find<NavigationStateProvider>();
+
+    return Obx(() {
+      return DropdownButtonHideUnderline(
+        child: DropdownButton2<Realm?>(
+          isExpanded: true,
+          hint: Text(
+            'Select Item',
+            style: TextStyle(
+              fontSize: 14,
+              color: Theme.of(context).hintColor,
+            ),
+          ),
+          items: [null, ...realms.availableRealms]
+              .map((Realm? item) => DropdownMenuItem<Realm?>(
+                    value: item,
+                    child: Row(
+                      mainAxisAlignment: MainAxisAlignment.center,
+                      children: [
+                        if (item != null)
+                          AccountAvatar(
+                            content: item.avatar,
+                            radius: 14,
+                            fallbackWidget: const Icon(
+                              Icons.workspaces,
+                              size: 16,
+                            ),
+                          )
+                        else
+                          CircleAvatar(
+                            backgroundColor:
+                                Theme.of(context).colorScheme.primary,
+                            radius: 14,
+                            child: const Icon(
+                              Icons.public,
+                              color: Colors.white,
+                              size: 16,
+                            ),
+                          ),
+                        const Gap(8),
+                        Expanded(
+                          child: Text(
+                            item?.name ?? 'global'.tr,
+                            style: const TextStyle(
+                              fontSize: 14,
+                            ),
+                            maxLines: 2,
+                            overflow: TextOverflow.ellipsis,
+                          ),
+                        ),
+                      ],
+                    ),
+                  ))
+              .toList(),
+          value: navState.focusedRealm.value,
+          onChanged: (Realm? value) {
+            navState.focusedRealm.value = value;
+          },
+          buttonStyleData: const ButtonStyleData(
+            padding: EdgeInsets.symmetric(horizontal: 16),
+            height: 48,
+            width: 200,
+          ),
+          menuItemStyleData: const MenuItemStyleData(
+            height: 48,
+          ),
+        ),
+      );
+    });
+  }
+}