Recently in the logs for this site I have noticed that people are finding the site at the URL of ledzeppelin-reference.com.
I bought that domain name a while back and intend to rebrand this site with that title when I next update the code. Currently you can get to the site by going to ledzeppelin-database.com or ledzeppelin-reference.com. This will continue to be the case.
However, I haven't advertised the ledzeppelin-reference.com title yet because I am not actually ready to use it. I was surprised to see that it is turning up in google searches. The problem with using that name right now is that the version of google maps that I am using on the tour page doesn't allow me to have more than one domain name. It is pinned to a specific domain.
I am upgrading to the newest version of google maps and it will eventually let me use more than one domain, but I won't be ready to update the code for the site publicly for another couple of months.
So, in the mean time, if you have bookmarked the site with a ledzeppelin-reference.com address then please update your bookmark to one using ledzeppelin-database.com. That will enable you to use the mapping on the tour page correctly.