u/TrueTooth4604

Hello! I am going to be in Mexico around mid July. Planning to visit Monterrey, Mexico City, Oaxaca, Puerto Escondido, and maybe Isla Mujeres or Playa del Carmen. Can anyone give me some recommendations on activities/museums/neighbourhoods that I absolutely cannot miss out on? I was hoping to see some cultural sites, museums and maybe even do a beginner hike. Thank you!