- Please call 48 hours prior to your tour to confirm your departure and/or pickup time. [email protected] / [email protected] 212-522-367-200 - Please make sure you have a printed voucher with you and present it to our staff at the departure point in front of GRAY LINE OFFICE - Valid identity papers are obligatory (passport or identity card) - Children under 2 years old are free. - We recommend bringing a camera and video recorder.