second home

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun In women's lacrosse, an offensive player who plays behind the first home and acts as a playmaker.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun vacation home
• noun pied-à-terre
• noun A home of a close relative or friend where one spends a great deal of time or feels welcome.
• noun Any place where one spends a great deal of time away from one's primary home, such as an office, a remote town or a foreign country.