Read the text. Fill in the gap with the missing part of the sentence.
The northern end of the route starts at the seaside resort town of Llandudno. From there, the route runs down ________________ .

• to the capital city of Cardiff on the southern coast
• seeing the animals, farm task demonstrations, and crafts
• with something to please every type of traveller
• from Roman-built foundations to tunnels that served
• right through the heart of Wales
• originally built in 1853
• which are visited every year