As you lie in bed in your city apartment with the window open and the sound of traffic below, a heavy rainstorm with thunder rolls in to gently lull you to sleep.

Fall asleep in a cozy, country bedroom with the gentle tap of raindrops on your window and a light wind blowing outside.

You are sleeping comfortably inside your tent, wrapped up tight in your sleeping bag, while outside the wind howls through the leaves and a soft campfire crackles.

You are tucked into bed at an oceanfront beach house. Outside you hear the waves lapping against the beach and the rumble of thunder in the distance.

You are taking an overnight train trip while soft rain pelts on the car windows. The low hum of the tracks quickly lulls you to sleep as the countryside rushes by. 

Spend on the night inside a ship, hearing the waves lapping gently outside, the creak of the hull, and the low hum of the engine room.

Fall asleep to the sound of heavy rain, wind, and thunder.