A good trip mixes a few kinds of days. Here are some favourites.
Ideas

Take the hill train
Kandy to Ella, one of the world's prettiest rides.

Go on safari
Leopards in Yala, elephants at Minneriya.

See whales
Off Mirissa from November to April.

Visit a tea factory
From leaf to cup in the hills.

Play golf
Five 18-hole courses, two from the 1800s.

Fly by seaplane
Short scenic flights between regions.