natural

https://tts.langeek.co/read?text=bmF0dXJhbA&hash=fbcf7da1691b9573ddba017bcd3e3fb8c8bf11ba&lang=en&cache-only=0&driver=googletts&accent=US

Here you will find the vocabulary from Unit 10 - Lesson 3 in the Top Notch 3B coursebook, such as "valley", "canyon", "extraordinary", etc.