Are there any immigration forms or visas for Colombia?I would do Salt Cathedral but that is a multi hour excursion as it is like one hour to get there and one to get back and a few hours to spend there. Montserrate is simply a nice view along with a cute church and you could do the whole thing in like one hour, especially if you buy the "fastpass" ticket that gets you to the front of the funicular/gondola ride. So it also depends on how much time you have.