def get_offer_photos_links(html_parser):
    """
    This method returns a list of links to photos of the apartment.

    :param html_parser: a BeautifulSoup object
    :rtype: list(string)
    :return: A list of links to photos of the apartment
    """
    gallery = html_parser.findAll(class_="gallery-box-thumb-item")
    return [p.attrs["href"] for p in gallery]