Imagine waking up one morning with a shark outside of your window.

That’s the reality when you book a stay at one of the world’s underwater hotels.

In Saint Lucia, you can spend the night in the “Lovers Deep”–a luxury submarine for two. You can choose where to park your hotel for the night, and you can wake up to coral reefs or other underwater treasures.

Caution: It’s expensive. Saint Lucia isn’t your only option for underwater quarters.

Conrad’s Rangali Island’s Muraka suite is 16 feet underwater.

If you can’t decide whether you want stargazing or seagazing, go to the Manta Resort in Tanzania, where the three story underwater room has a submerged bedroom with a rooftop deck.