8 Sights in Powys, United Kingdom (with Map and Images)

Dan yr Ogof, at the National Showcaves Centre for Wales, is a 17-kilometre (11 mi) long cave system in south Wales, about 5 miles (8 km) north of Ystradgynlais and 15 miles (24 km) southwest of Brecon, in the Brecon Beacons National Park. It is the main feature of a show cave complex, which is claimed to be the largest in the UK and is a tourist attraction in Wales. The first section of the cave system is open to the public, but the extensive cave system beyond is scheduled as a national nature reserve and is open only to bona fide cavers.

Wikipedia: Dan yr Ogof (EN)

St Stephen's Church is a Church of England parish church in Old Radnor, Powys, Wales. It was constructed in the 15th century in perpendicular gothic style on the site of a 6th-century church. Although much restored and rebuilt, it may have the oldest church organ in the United Kingdom; the organ case, although later, is also very early. It is a grade I listed building.

Wikipedia: St Stephen's Church, Old Radnor (EN)

The Elvis Rock is a rock alongside the A44 in Powys, Wales, near its border with Ceredigion. It is one of the most well known pieces of graffiti in Wales, with the word "ELVIS" written on it. The rock is located beside the main trunk road through the country, and appears out of context with the surrounding landscape.

Wikipedia: Elvis Rock (EN)

The Church of St Issui, Partrishow, Powys, Wales, is a parish church dating from 1060. The existing building was mainly constructed in the 14th and 15th centuries and was sensitively restored in 1908–1909. The church is most famous for its rood screen which dates from 1500. It is a Grade I listed building.

Wikipedia: St Issui's Church, Partrishow (EN)

The Cantlin Stone is a rough stone approximately two feet across with an inscription recording the death of one Willam Cantlin in the place where it is, and the fact that he was buried at the Bettws. It is accompanied by a cross, and is located only twenty or so yards away from the Wales–England border.

Wikipedia: Cantlin Stone (EN)

The Maen Madoc or Maen Madog stone is a menhir which lies adjacent to the Roman road Sarn Helen that runs across the Brecon Beacons in what was a key area of Roman Wales, about one mile (2 km) north of Ystradfellte. It stands approximately 10 feet high.

Wikipedia: Maen Madoc (EN)

The Tabernacle Baptist Chapel, Ffwthog, near Cwmyoy, Monmouthshire is a Baptist chapel, with attached manse, dating from 1837. Largely unaltered externally and internally, the chapel is a Grade II* listed building.

Wikipedia: Tabernacle Baptist Chapel, Cwmyoy (EN)

Castell Dinas is a hillfort and castle in southern Powys, Wales. At 450 m (SO179301) it has the highest castle in England and Wales. It is positioned to defend the Rhiangoll pass between Talgarth and Crickhowell.

Wikipedia: Castell Dinas (EN)