This Chelsea townhouse at 449 West 24th Street has some bragging rights both inside and out. Exterior-wise, the 21-foot-wide home is surrounded by greenery and outdoor space on a block of other historic townhouses. Inside, over 4,073 square feet, mid-century and Danish interior design has added a unique and modern touch. Big walls of glass, finally, connect the indoor and outdoor elements. If you’re digging the connection, the property has just hit the market for a cool $11 million.