Hello and welcome to the real life Fortress of Solitude. This unbelievably beautiful cavern is inside Vatnajökull, Iceland's biggest glacier, captured by photographer Kate Friend, who took a stunning series of shots inside this 8000sqkm ice mass.
Can you believe this pic wasn't colour-corrected in Photoshop? The blues are so crisp and so clear, I can only imagine what they looked like in person. Unfortunately, Vatnajökull is melting at a meter-per-year, so images like these are not only incredible, they're also preserving the place in a way that be quite different next time she visits.