Another example: a relative of mine was on a trip last year and was almost in walking distance of a place I thought he might like to see. But it was on the othe

Another example: a relative of mine was on a trip last year and was almost in walking distance of a place I thought he might like to see. But it was on the other side of a border with tight controls and long lines, so it wouldn't have been convenient to visit at all. Actually, I guess there are quite a lot of places like that. I've been to both the Brazilian and the Argentine sides of Iguazu Falls, and they're both great, but one is not officially allowed to cross between them inside the parks, so no infrastructure has been built to facilitate that, even though it's literally just across a river. Or, I've heard it's quite inconvenient to get between Kinshasa and Brazaville, the two largest cities in their area, both national capital cities that face each other across a river just about two kilometers apart. There is a ferry but it's not quick and easy.