Caerphilly (Welsh: Caerffili) is a town in the county borough of Caerphilly, South Wales, located at the bottom of the Rhymney Valley, with a population of approximately 31,000.

Caerphilly is a commuter town of Cardiff and Newport. It is about 2-3 miles north of the Cardiff suburbs of Lisvane and Rhiwbina, separated by Caerphilly Mountain. It is traditionally within the county of Glamorgan, on the border with Monmouthshire and it is the largest town in the county borough of Caerphilly, which since 2003 has formed part of the lieutenancy area of Gwent.

The Twyn Chapel
The Twyn Chapel was originally built in 1862.  In recent years it has undergone exensive refurbishment which has retained its' unusual style of architecture. It is now used mainly as a community centre. Providing the local community with rooms to hire for all sorts of occasions. The Twyn Chapel is host to Farmers Markets, Craft Fayres, Antique Fayres and art exhibitions.

The town gives its name to Caerphilly cheese, which originated in the area.

Caerphilly cheese is a hard, white cheese that originates in the area around the town of Caerphilly in Wales, although it is now also made in England, particularly in the South West and on the English border with Wales. It was not originally made in Caerphilly, but was sold at the market there, hence taking the town's name.
It is a light-coloured (almost white), crumbly cheese made from cow's milk, and generally has a fat content of around 48%.
It has a mild taste, but perhaps its most noticeable feature is its saltiness. It is rumoured that the cheese was developed over time to provide the coal miners of the area with a convenient way of replenishing the salt lost through hard work over ten hour shifts underground and so was a staple of the diet of the coal-miners.
Caerphilly was one of the many cheeses mentioned in the "Cheese Shop" sketch from Monty Python in the 1970s.

Real Farmhouse Caerphilly production died out during World War II as all milk had to go to the Cheddar factories to help the war effort. After the war these factories started making their version of Caerphilly (initially to help their cash flow as Caerphilly matures quicker than Cheddar), which is how it is mostly known today, dry and crumbly. However, there are now two or three farms making original Caerphilly which is dry in the middle and creamy around the edges.