Half of a Half

I walked quickly between the massive, ornate buildings on either side of the path; many were pockmarked with holes from WWII-era artillery that ranged from the size of a finger to a closed fist. The booming thunder drew a stark contrast with the blooming gardens and groomed lawns, while fat raindrops splattered on the pavement. As the sky grew darker, pale yellow lights flickered on in many rooms. However, one beautifully decrepit building remained dark in the gray twilight, and a way inside paved the way for a return trip in the morning...

After groggily sneaking into the opening the next day, we made our way into the central basement corridor. The dank and moldy stone walls were a welcome sight, however every door had been securely locked... only a single stairwell was open. Even from here everything was well secured; the only way out of this dead end exploration seemed to be a climb up and over a high partition. I threw myself over only to discover that half of the floor was accessible! So here's what I ended up with - half of a half of a building.