'Parque Principal' is the central square of Campeche, from there you can start a citytour in one of the open trams.
Campeche, now with around 180,000 inhabitants was built around 1540 by the Spanish and once was the most important harbour of Yucatán.

The blurred spot somewhere near the middle of the picture is a result of condensation on the lense.
As a warning for photographers all around: regurarly check your gear ...