Can anyone tell me what these are?

[Sidviciouser]

I know the first one is an iguana, but does anyone know what kind? Found these critters in Playa Del Carmen last week.

Thanks!

 

[M&I Gecko]

I saw the bottom one near my house. I think the bottom one is a fence lizard.

 

[ElapidSVT]

first looks like a spiny tailed iguana, Ctenosaura spp. the second is most likely a Sceloporus (fence lizard) of some sort