Tourist 
segment:

Classification of the travellers in this profile

Based on their profile, the German couple visiting Ireland fits the "Culturally Curious" traveller segment according to Fáilte Ireland's segmentation. Here's the relevant quote from the Fáilte Ireland website:

"The Culturally Curious are independent 'active sightseers' looking to visit new places, and expand their experience by exploring landscapes, history and culture. They are unlikely to return for some time once they have visited a new place, and often travel in a couple or as individuals and rarely in a family group. The age group for this demographic is 40 plus."

Source: Fáilte Ireland, "Culturally Curious", https://www.failteireland.ie/FailteIreland/media/WebsiteStructure/Documents/eZine/Culturally-Curious.pdf

This couple matches this segment for several reasons:

1. They are school teachers, likely in the 40+ age group.
2. Their primary travel purpose is leisure and cultural exploration.
3. They are interested in historical and cultural sites, local experiences, and meeting locals to learn about Irish customs and traditions.
4. They prefer a cozy B&B accommodation and scenic drives, indicating a desire to immerse themselves in the local landscape and culture.
5. They are traveling as a couple, which is common for the Culturally Curious segment