BOSTON: Frost Ice Bar

1 Faneuil Hall Sq.

What it is: A year-round ice bar

No matter what temperature it is outside, the world's largest permanent indoor ice bar remains a frosty 21 degrees Fahrenheit. The walls, floors, furniture, and drinking glasses are all carved out of ice. Patrons don't check their coats at the door — instead, they're each given insulated purple parkas and gloves to keep them warm while they party.

Guests under 21 are allowed before 5pm, but they're not allowed to drink alcohol — though they can enjoy delicious "mocktails."