The Caldwell Observing Log (TCOL) is quite similar to The Ultimate Messier Object Log, except the fact it renders the 109 objects described by Sir Patrick Caldwell Moore in his Caldwell Catalog.

These objects include the Veil Nebula, North American Nebula and other worthwhile sights. While many of these objects are beyond the reach of smaller scopes, some can be seen without a scope at all. (i.e., The North American Nebula.)