What is behind the mystery door?

This is a contest held by @onceuponatime and this is my entry to that contest

WHAT IS BEHIND THIS MYSTERIOUS DOOR?

I went through a blog and I thought its perfect for this contest with certain modifications I present it in front of you guys.
When I saw an old, rusty wrecked door. I started to approach it, but it was petrifying to open the door, not knowing what hid behind the rusty, scratched and wrecked door. As soon as I over came my fear, I slightly punched the door open. The door creaked loudly as I opened it slowly. Inside the derelict door were old but posh furniture covered with dust and cobwebs; which spiders crawled on. Everything looked so tender and elegant, at the same time spine-chilling. I heard a knocking noise, echoing from the stairs.

As I put my foot on the stairs to climb to the second floor, the staircase cried.

That did not stop my curiosity in any way. When I reached the top floor, I heard no more of the knocking noise. So I wondered around the top floor, observing every room. In one of the rooms, which was located to the east of the house, I heard the knocking noise again.

I pressed my ears against the wall, and listened to the noise become louder.

Suddenly, I fell down, forward, hugging the wall. Behind the wall was a secret tunnel. When I got up and shook all of the dust and dirt off my clothes, I cautiously crept into the tunnel.

Cobwebs everywhere with spiders crawling and eating poor flies, dust flying around and the noise getting closer and closer to me.

Soon I came to a door. I pulled the door handle toward me. It did not open. I pushed the door handle away from me. It did not open. That was the moment I took off the key that hung on the neck of a deer which was just above the door.

I inserted the key and twisted my hand. The lock made a cracking noise and opened. I pushed the door open and couldn't believe my eyes.

My eyes were reflecting the shine I saw before me. It was beautiful.

Should I take it all with me, I saw some witchy things with that shining treasure, I then went into a deep thought, I shouldn't have entered that door at the very beginning, what should I do now? Maybe this gold is cursed. After a while I decided to leave it as such and left the whole place.

I made a big mistake while opening that door, I will regret my whole life why I didn't took all that treasure with me, my life would have been different, on the other hand I think if I would have took the treasure with me that curse (maybe) on that gold could have ruined my life. I sometimes think I made a right decision but sometimes I think not. What do you say?
Credits: Google