Hidalgo State is known historically for its rich mining reserves, particularly for silver. Exploited for hundreds of years by the Spanish government, eventually a group of British miners migrated from Cornwall, England to introduce new technology to these mines. They left their mark by introducing both soccer and pasties (a meat pie or turnover that was easy for them to take down into the mines for lunch) into Mexico.
Real del Monte has been classified a Magical Town by the Federal Government due to its charm. There is lots to see and do there, including visiting a real mine which has been converted into a museum.
The nearby Basaltic Prisms are a natural wonder. One-hundred-fifty-feet-tall columns or prisms of rock were formed millions of years ago when a lava explosion came into contact with the cold waters of the river in the Santa Maria Regla Gorge or Gully. The only other site comparable to this in the world is a similar formation in Northern Ireland.
The charming city of Pachuca has several museums including the National Photography Museum which is fascinating, making for an unusual day trip.