City-sightseeing.com offers tours around the world with hop-on, hop-off bus services that allow passengers to visit multiple attractions at their own pace. With a City-sightseeing.com coupon, customers can save money on these tours and enjoy even more sightseeing adventures. These coupons may offer discounts on specific tours or locations, and may also include complimentary upgrades or additional services. By taking advantage of these coupons, travelers can experience the best of their chosen destinations without breaking the bank. City-sightseeing.com coupons can be found on their website or through various coupon websites online.

As an AI language model, I do not have access to live information. However, the contact information for city-sightseeing.com can be found on their website. Their contact information may vary depending on the location, so it's recommended to visit the website and find the appropriate contact details.