Saladin Citadel’s Prison Museum, Cairo, Egypt

Inside the Al-Rifa'i Mosque, Cairo, Egypt

Inside the Al-Rifa'i Mosque, Cairo, Egypt

Mosque-Madrasa of Sultan Hassan, Cairo, Egypt

Mosque-Madrasa of Sultan Hassan, Cairo, Egypt

Mosque-Madrasa of Sultan Hassan, Cairo, Egypt

Al-Rifa'i Mosque from the window of the Mosque-Madrasa of Sultan Hassan, Cairo, Egypt

Mosque-Madrasa of Sultan Hassan, Cairo, Egypt

Mosque-Madrasa of Sultan Hassan, Cairo, Egypt

Al-Rifa'i Mosqu & Mosque-Madrasa of Sultan Hassan, Cairo, Egypt

The control building of the Røldal-Suldal hydropower facility

Inuvialuit Igluryuaq (interior)

Aerial View of Castrotorafe Castle

Witching hour in Ammerland: The blood-red dawn on Halloween day

Red Square with State Historical Museum and GUM Moscow 360 Panorama

360° winter panorama of the Kremlin and Red Square viewed from Sofiyskaya Embankment in Moscow, Russia. Early January morning with frost and fresh snow, cold clear weather, iconic winter cityscape.

Elliott Creek Ridge - Applegate Lake (aerial)

Mars Dust Killed NASA's InSight Lander

150 Mile Little Red Schoolhouse

Kamloops Red Bridge At Sunset

Red Canyon 08 - Birdseye Trail

Giant Western Red Cedar [1]

Giant Western Red Cedar [2]

360° winter panorama of the Kremlin and Red Square viewed from the Floating Bridge in Zaryadye Park, Moscow, Russia. Early January morning with frost and fresh snow, cold clear weather, iconic winter cityscape.