Perdido en el pasado [Lost In The Past]

There is a legend that says that many years ago there was a medallion that allowed to open any door that led to the future or past. Many treasure hunters tried to find the medallion but were unsuccessful. To this day nobody knows if it is true or not, but they say that this medallion was inherited generation after generation in a family that collected antiques for many centuries and to verify it you will have to travel to the past and remember that the only way to return will be to find the medallion and make it work. Do you dare to try? But you must be careful or you will stay forever in the past!