So I find myself in Colonia, quite accidently. I had two passengers that were paying 60m Cr between them to visit the area, but I made the mistake of sightseeing for myself - dropped in to Colonia, fancied seeing Jacques, got scanned, they got annoyed and left. 60m Cr down the drain and 21kLy from home. Bummer.
If you're fit for passenger missions, there are a lot of local missions from people wanting to take a quick day trip to Jaques and back, available at just about any station in the region. You can make back the 60m very quickly that way once you get to Allied. Extra passenger cabins are available at Colonia Dream if you need them (but make sure you store rather than sell any equipment over D-rated as it may be tricky to get it back)
As far as other things to see:
- land at Concordia Hub just after sunset or just before sunrise: the mountains are amazing when they catch the light just right.
- Moore's Charm and Foster Terminal are definitely worth a visit.
- Magellan's Walhalla Port is one of the few settlements in a neutron star system. It also has amazing sunrises if you catch it at the right time in its orbit.
- the secret prison colony of Pekoe (pretends to be uninhabited on the Galmap)
- there's a crashed T-9 on one of the moons in the Colonia system. There's a listening post near Colonia 2 which will almost give you the coordinates (read as long x lat, rather than the more conventional lat x long)
- Rodentia has a ringed Earthlike
- There's a rare glowing green gas giant in the nebula (Eol Prou KW-L c8-something ... sorry, can't remember the final number)