3 sentences

1. 远处是一望无际的大海。

   yuǎn​chù shì yī​wàng​wú​jì de dà​hǎi.

   In the distance is the boundless sea.

   Source: Dong Chinese Dictionary

2. 这片肥沃的平川上一望无际。

   zhè piàn féi​wò de píng chuān shàng yī​wàng​wú​jì.

   The fertile plain stretches as far as the eye can see.

   Source: Dong Chinese Dictionary

3. 一望无际的大洋上，只有一艘小船在缓缓行驶。

   yī​wàng​wú​jì de dà​yáng shàng, zhǐ​yǒu yī sōu xiǎo​chuán zài huǎn​huǎn xíng​shǐ.

   On the vast ocean, only a small boat sailed slowly.

   Source: Dong Chinese Dictionary