Here are a few examples:
* In the garden, the flowers bloomed brightly.
* Under the table, the cat curled up for a nap.
* After the rain, the sun peeked out from behind the clouds.
However, it's important to note that starting a sentence with a prepositional phrase can sometimes sound a bit formal or awkward. It's generally better to use them sparingly and to make sure that the sentence flows smoothly.