Just steps away from the anchored concrete Southernmost Point Buoy, the southernmost home in the continental U.S. — you literally cannot get any further south unless you are going to Cuba — is for sale for $18.5 million. The backyard has a marker that reads, "North America begins here."
The 4,008-square-foot, five-bedroom, five-and-a-half-bathroom historic waterfront home at 400 South St. features unobstructed ocean views, wooden cathedral ceilings, sealed coral stone flooring, an elevator, restaurant-style stainless steel double Viking stove and ovens, a Sub-Zero fridge, a large wraparound balcony, pool, and a spacious lounging area.
"As you enter through the front door into a formal living room, you are transported back to the Hemingway era," the listing reads.
Monroe County property records show the property belongs to Cecilia Joyce Johnson — the wife of late sculptor and Johnson & Johnson heir John Seward Johnson II, who died at age 89 in Key West in March 2020. The couple had purchased the home in 1994 for $1.5 million, according to property records.
Listing agent Ellen Gvili of Ocean Sotheby's International Realty notes part of the home needs a complete renovation and the 1,930-square-foot seawall requires partial restoration. A letter from the Army Corps of Engineers approved the construction of a 665-square-foot dock on the property.

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo

Ocean Sotheby's International Realty listing photo