In more traditional* terms:
Wands - A desert or dry land, with little greenery. Hot and dry. (Because their bright energy burns up the land and the water and their light exposes things for what they are; not a lot of hidden spaces in a Wands land.)
Cups - A barrier island, close and connected to a larger land mass, but surrounded by both River and Ocean. The land would be lush and undeveloped. Humid and warm, with the potential for rain, sun, hail. A range of temperatures---from almost-hot to almost-cold, but a very temperate land. No snow or extreme heat. (Because their fluid energy attracts water and feeds plantlife, and their nature is a bit changeable, so the weather patterns would need to change. Both River and Ocean represent them because their waters can be still and focused or expansive and violent.) Could also be a forest or anything lush and fertile.
Swords - A tundra or winter-land. There would probably be mountains, but there would be expanses of flat space as well. Snowing the majority of the time, but not always. The potential for clear land, melted snow. (Because the mind can be cold, but it can also pierce through the cold and detachment to create the Ace of Swords.)
Pentacles - A community of any kind.
*By traditional, I don't mean traditional depictions---I mean simply not considering 'modern places.'
In modern terms:
Wands - A rural area or anywhere with few people. Landscape doesn't matter---your own island, your own farm, etc---the idea is that it is more individualistic than a shared community.
Cups - A peaceful suburb, with darker aspects potentially under the surface.
Swords - A large city. Cold and potentially detached, but full of moving energy.
Pentacles - A small town or growing city. The spirit of building. Something wholly formed.