Before we got to the parking area we were waved to the side of the road and people tried to aggressively sell us a tour guide. After pulling over for the first official-looking flag waver and realizing they weren't official people, we followed the van in front of us, not stopping and not making eye contact with any of these roadside salespeople. The actual parking lot for Chichen Itza was full when we arrived (around 10:40 AM) and we were turned around to a side lot paying cash (MX110) to park in the dirt and a short walk among outside vendors to get to the site. People were crowded at the entrance but we managed to get in a ticket line which ended up being two ticket lines (one for actual tickets and one to pay taxes). Around USD 36/person later we were in the park and being hassled by more salespeople. The vibe was like a farmer's market with a pyramid as a backdrop. The famed Sacred Cenote was a long walk down a corridor filled with more vendors. We didn't feel the need for a guide or to spend longer than an hour. I was sad that we couldn't go up the stairs of the pyramids like you can in Teotihuacan, but they looked plenty steep! You won't have to worry about forgetting to clap for the echo because there are many tourists and guides all around demonstrating this effect for you. read more