This Galway tourism site has tons of beautiful pictures of holy wells!
There are holy wells all over Europe. Like the spring at Lourdes, they are usually associated with miraculous cures, as well as being a convenient place of pilgrimage associated with early saints. But as this page points out, most of the older holy wells were a source of baptismal water for the earliest missionaries, before churches could be built. Some may have been baptistries for old parish complexes, or water sources for hermitages.
Anyway, we don’t tend to have them in the US, so take a look!
There are also some nice pictures of market crosses and roadside shrines. Most of the latter fall into the categories of “We have concrete and we’re not afraid to use it!” and “Lourdes grotto replicas are cool.” But hey, I like devout use of concrete.