You can hire a tour from Bogota, but it will be less expensive if you go by yourself by bus. It's
30 min away from Bogota and you can ask for directions once you're at Zipaquira.
It's a great activity when traveling alone or with friends or family. The cathedral was built inside a salt mine and it's located at "Parque de la Sal" (Salt Park).
There you can also access the Museum of mining, mineralogy, geology and natural resources. You will find different options when buying the ticket, and some will include different activities.
Great place to take amazing pictures.