India. Kashmir has it but wife is scared of terrorists, even though Kashmir is having a great tourist season this year.

Edit:adding more. We lived in Chicago. Wyalusing park Wisconsin had amazing colours one year, but we once did a road trip to Vermont and upstate New York, and it was heavenly there at Whiteface mountain, especially.

We also lived in the UK for 6 yeas, and took pains to go to Westonbirt arboretum every year, even though we did not have a car and it was not well connected.