Most unusual itinerary you've planned

I recently had a client request a multi-stop trip that included three different continents in just ten days… It was a challenge to make it cost-effective while ensuring a smooth travel flow. What’s the most interesting or complicated itinerary you’ve had to put together?

‌⁠‍⁠​‍​‍‌⁠‌​​‍​‍​⁠‍‍​‍​‍‌⁠‌​‌⁠​‍‌‍​‌‌⁠‌‍‌‍‌‌‌‍⁠​‌‍​‌‌‍‌⁠‌‍‌‌‌‍⁠‍‌⁠‌​​‍​‍​‍⁠​​‍​‍‌‍‍⁠​‍​‍​⁠‍‍​‍​‍‌‍⁠‍‌‍‌‌‌⁠‌⁠‌‌⁠⁠‌⁠‌​‌‍⁠⁠‌⁠​​‌‍‍‌‌‍​⁠​‍​‍​‍⁠​​‍​‍‌‍‍‌‌‍‌​​‍​‍​⁠‍‍​‍​‍‌‍⁠‍‌‍‌‌‌⁠‌⁠​‍​‍​‍⁠​​‍​‍‌‍‌​​‍​‍​⁠‍‍​‍​‍​⁠​‍​⁠​​​⁠​‍​⁠‌‍​⁠​​​⁠‌​​⁠​‍​⁠‌​​‍​‍​‍⁠​​‍​‍‌‍‍​​‍​‍​⁠‍‍​‍​‍‌‍‍‍​⁠​‍‌‌‌‌‌​‌‍‌​​‍‌​⁠​‌⁠‍‌​⁠​⁠‌⁠‍‍​⁠‌⁠‌​‍‍‌⁠‌‌‌‌‌​‌‍⁠⁠‌‍‌⁠‌‍‌‌​‍​‍‌⁠⁠‌