The US chapter of the Vishwa Hindu Parishad and Hindus across the US put up more than 40 billboards in 10 states and more inviting devotees to Ayodhya ahead of the grand 'Pran Pratishtha' ceremony at the birthplace of Shri Ram Lalla in Ayodhya on January 22, news agency <em>ANI</em> said in a report.