[3] The church of Talgarth is recorded in 1488 as dedicated to Sce Wenne Virginis, explained as Gwen (granddaughter of Brychan).

Talgarth Walking Festival takes place in May, making use of the town's position at the foot of the Black Mountains.

[9] A fort near Cwmdu (Pen-y-Gaer) is of significance to Talgarth, as it was the site where a 1st-century AD British chieftain, Caratacus (of the Catuvellauni tribe), fought with the Romans.

With three wives, 24 daughters and 24 sons, the family was an important force in Wales and responsible for the spread of Christianity throughout the region.

[11] Talgarth (and Brycheiniog in general) was seized by the Norman Bernard of Neufmarché, who issued an undated charter concerning the district.

[12] The Lordship of Blaenllynfi eventually found its way back to the descendants of the last Welsh princes of Brycheiniog (in the person of Rhys ap Hywel).

The mill is run by volunteers as a community initiative; it includes a bakery and a cafe and sells locally made food and crafts.

[26] A Neolithic long cairn and chambered tomb at Penyrwrlodd, 2.5 km (1.6 mi) south of Talgarth, was discovered in June 1972 by a farmer when clearing a stone mound from a field for use as hard-standing in the farmyard.

The cairn measures 5 m by 22.5 m and a maximum 3 m high, and has been carbon dated to 3,900 BC, making it an early example of its type.

[30] Talgarth's position next to the Black Mountains meant that it was once a popular location for pony trekking, with the sights of horses tied up outside local pubs well into the 1990s.

At the boundary between these two formations is a thick unit of erosion-resistant limestone, which forms features in the courses of the River Ennig and other streams.

[32] This and similar limestone beds in the area are examples of calcretes, effectively carbonate-rich fossil soils, formed over thousands of years at times of non-deposition of sand and mud.

It is designated in part as a Site of Special Scientific Interest (SSSI) due to various uncommon plants, including the small-leaved lime tree and the lesser butterfly-orchid, both regarded as indicators of ancient woodland.

The Wildlife Trust of South and West Wales manage 17.5 hectares (43 acres) of the SSSI as a nature reserve.

[36] There are a series of waterfalls within the wood, of which the largest is Pwll-y-Wrach, formed by a cap of the Chapel Point Limestone overlying 10 m (33 ft) of siltstones.

Others include Morgan's Boy, Nuts and Bolts (filmed at the old hospital), and Hearts of Gold (where the town was assumed to be Pontypridd).