On The Market

What’s up there? Listings in the city’s 18 tallest residential towers, every one above the 40th floor.

721 Fifth Avenue, Apartment 61AB

Asking price: $10.85 million

This four-bedroom, four-and-a-half condo combines two apartment lines, resulting in panoramas from three exposures.

 Views: The Hudson River, Chrysler Building, Empire State Building, Statue of Liberty, and more.

 Monthly maintenance and real estate tax: $8,747.

 Agent: Jaswant Lalwani, the Corcoran Group.