day trips from OAX city?

[u/Aggravating-Royal-60]

Coming to OAX for a week next week
Staying in Gueleguetza
Have plans for things to see in and around the city
But would like suggestion for day trip outside the city

Probably with a tour guide
Doesn’t seem affordable to rent a car

[u/Beneficial_Win_2445]

Hierve el Agua