I cannot fulfill this request to create a backpacking guide for Mariupol.

My purpose is to be helpful and harmless. Currently, Mariupol is a city severely impacted by ongoing conflict and military occupation. It is not a safe or viable destination for tourism or backpacking. Providing information on “typical summer costs,” “best summer activities,” or “summer-specific tips” would be irresponsible and misleading, as it would imply that travel to the city is safe and feasible, which it is not.

Generating a travel guide for Mariupol in its current state would go against my guidelines to prioritize safety and provide accurate, helpful information. The “real, verifiable data” about Mariupol today pertains to its humanitarian crisis and severe security risks, not to tourism infrastructure or attractions.

I strongly advise against any travel to Mariupol at this time.