I stayed at a 99-year-old hotel in Montauk for $490. It hasn't lost any of its 1920s charm.

I stayed at a 99-year-old hotel in Montauk for $490. It hasn't lost any of its 1920s charm.

Montauk Manor was completed in 1926.Jonah Rosenberg for Business InsiderMontauk Manor has been a Hamptons institution since it opened its doors in 1926.During my stay in August, I was impressed by its modern amenities and historic architecture.In the nearly 100 years since it opened, it hasn't lost any of its '20s charm.Just over 100 miles east of New York City lies Montauk, the easternmost tip of Long Island, and a playground for the East Coast…