Add punctuation: The chambers are furnished with a narrow passage so that the home of the dead could be visited again and again
A: The chambers are furnished with a narrow passage, so that the home of the dead could be visited again and again.

Add punctuation: Lapland is also home to the one and only Santa Claus whose office is probably the most exciting place imaginable for children
A: Lapland is also home to the one and only Santa Claus, whose office is probably the most exciting place imaginable for children.

Add punctuation: It is also necessary count with a variety of fakes and authors of not very reliable claims
A:
It is also necessary count with a variety of fakes and authors of not very reliable claims.