A mountain is higher/lower than a hill.
higher than
A mountain is more/less isolated than a resort on the coast.
more
An empty harbour is the most pleasant/least pleasant place to park your boat.
most pleasant
coldest
A coral reef is more colourful/less colourful than a swamp.
more colourful than
A coral reef is livlier/less lively than a glacier.
livelier
A camera is the best/worst thing to capture memories of your trip.
best
The empty field is the most boring/least boring part of the town.
most boring
A beach with few people is less peaceful/more peaceful than a beach with many people.
more peaceful than
The rainforest is duller/livelier than a field.
livelier
The city center is the liveliest/dullest part of the city.
liveliest
A cliff is the most frightening/least frightening part of a mountain.
most frightening
When you think about foods to eat at the beach, ice cream is better/worse than soup.
better
A place with beautiful scenery is more pleasant/less pleasant than a place with boring scenery.
more pleasant
coldest
wettest
A beach with many people is more relaxing/less relaxing than a beach with few people.
less relaxing
A cliff is more frightening/less frightening than a stream.
more frightening
The south is the coldest/warmest part of Spain.
warmest
A coral reef is the best/worst place to see different types of fish.
best