The US, and England, and probably other countries, have enacted laws that mean some sexual offences against children committed outside those jurisdictions can be tried inside the jurisdiction. Precisely to stop this kind of sex tourism.

See for example this from England:

https://www.legislation.gov.uk/ukpga/2003/42/section/48

https://www.legislation.gov.uk/ukpga/2003/42/section/53A