The Red Light District in Amsterdam is one of the most tolerant places of prostitution in the world. Girls offer their services at windows, constantly tapping and smiling at the passers by. In some, curtain are drawn, a sign that a customer is inside doing 'business'. Prostitution in Holland is legal, and the sex worker rights are protected by law as tax payers. The Red Light district also has a wide selection of sex shops and sex clubs, and at night it really comes alive. It is also one of the safest areas in town.