[2] The village is at the highest point of a low ridge running SW/NE: this is one of a series of Precambrian rock units oriented in that direction.

In the east of the community, by the Menai Strait, stands the country seat of the Marquess of Anglesey, Plas Newydd, parts of which date from the 14th century.

[5] Probably the village's most famous son is Tecwyn Roberts (1925–1988), who became NASA’s first Flight Dynamics Officer with Project Mercury that put the first American into space.

Roberts was born at Trefnant Bach cottage in Llanddaniel Fab and was a former pupil of Ysgol Parc y Bont.

After serving as a member of the Avro Arrow project team and the Space Task Group, Roberts transferred to NASA where he eventually became chief of the Manned Flight Support Division, chief of the Network Engineering Division during the Apollo Program and later Director of Networks at Goddard Space Flight Center.