diff --git a/app/errors.py b/app/errors.py
new file mode 100644
index 0000000..b273a65
--- /dev/null
+++ b/app/errors.py
@@ -0,0 +1,12 @@
+from flask import render_template
+from app import app
+
+
+@app.errorhandler(404)
+def not_found_error(error):
+    return render_template("404.html"), 404
+
+
+@app.errorhandler(500)
+def internal_error(error):
+    return render_template("500.html"), 500
diff --git a/app/templates/404.html b/app/templates/404.html
new file mode 100644
index 0000000..0bac211
--- /dev/null
+++ b/app/templates/404.html
@@ -0,0 +1,6 @@
+{% extends "base.html" %}
+
+{% block app_content %}
+    <h1>Sorry, we couldn't find that</h1>
+    <p><a href="{{ url_for('index') }}">Back</a></p>
+{% endblock %}
diff --git a/app/templates/500.html b/app/templates/500.html
new file mode 100644
index 0000000..984d38c
--- /dev/null
+++ b/app/templates/500.html
@@ -0,0 +1,8 @@
+{% extends "base.html" %}
+
+{% block app_content %}
+    <h1>An unexpected error has occurred</h1>
+    <p>The administrator has been notified!</p>
+    <p>If he gets too many notifications, we might replace him with an AI</p>
+    <p><a href="{{ url_for('index') }}">Back</a></p>
+{% endblock %}
diff --git a/app/templates/visualization.html b/app/templates/visualization.html
new file mode 100644
index 0000000..bb7c02a
--- /dev/null
+++ b/app/templates/visualization.html
@@ -0,0 +1,9 @@
+{% extends "base.html" %}
+{% import 'bootstrap/wtf.html' as wtf %}
+
+{% block app_content %}
+<h1>Dataset visualization</h1>
+<img src="data:image/png;base64,{{ plot }}" alt="Image Placeholder">
+<img src="data:image/png;base64,{{ map }}" alt="Image Placeholder">
+<p><a href="{{ url_for('data') }}">Back</a></p>
+{% endblock %}