Llanengan is the gateway to Porth Neigwl or Hell's Mouth as it is known to many. This four mile stretch of sand is one of the most famous surfing spots in Wales which conditions are right. Llanengan itself has a historic church, the Church of St. Einion. It is one of the oldest and said by many to be one of the prettiest churches on the Llŷn Peninsula. It has been a place of pilgrimage from around 1460 and was enlarged in 1520. The church has links with the monastery on Ynys Enlli (Bardsey Island).

The hills behind the village have been the site of mining for lead and there is still evidence of this that can still be seen today.