comfortable

 My house is not big, but it is comfortable.

 delicious

 The apple pie and custard are delicious.

 exciting

 What exciting news this is!

 tiring

 Oh, what a tiring day!

 interesting

 This book is interesting.

 spicy

 Do you like spicy food?

 frightening

 Please call your dog off. it's frightening the children.

 South Africa

 Swallows from England go as far as South Africa.

 Thailand

 I'm going to go to Thailand. I'm going to eat a lot.

 the Great Wall

 The Great wall is known for its long history and its magnificence.