Nothing creates a sense of space within a NYC apartment like a mezzanine

The nice thing about a mezzanine (think: a balcony located inside an apartment) is that its presence calls for double-height ceilings that create a vastness rarely found in New York City. Here are six eye-popping listings with this covetable feature.

At 213 West 23rd St., a four-bedroom three-and-a-half-bath condo (listed at $12.950 million) includes an upper level kitchen/living/dining room that overlooks a second entertaining space below.