I am a popup.").openPopup(); // Adding a Circle var mymap3 = L.map('leaflet3').setView([51.505, -0.09], 13); L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw', { maxZoom: 18, attribution: 'Map data © OpenStreetMapcontributors, ' + 'CC-BY-SA, ' + 'Imagery © Mapbox', id: 'mapbox.streets' }).addTo(mymap3); L.circle([51.508, -0.11], { color: 'red', fillColor: '#f03', fillOpacity: 0.5, radius: 500 }).addTo(mymap3); });