Tiya

There's not much here except the archaeological site, which, although impressive, doesn't take a lot of time to explore. Tiya is in central Ethiopia, in the northern part of the Southern Nations, Nationalities, and Peoples Region, some 90 km from Addis Ababa. It makes for a fine day trip from Addis Ababa or can be visited on route to, e.g., Langano.
Much of the exact background and history of the stones is not yet understood by experts, and interpretations of the depicted images vary. Guides will have interesting stories to tell, some of which are backed by research, while other rather stem from local beliefs.

It's possible and convenient to hire a car (with guide) in Addis Ababa. Less convenient, but obviously cheaper, you can take public transport. There's an early morning bus to Butajira from Addis Mercato (the market square in Addis Ababa). It leaves before 9am, so make sure you're there early. Ask to be dropped off at Tiya.

The archeological site is half a kilometre or so from the village centre. If you get here by public transport, you'll be fine walking.

There are a few cheap hotels in town.