The Workers' Assembly Halls are a group of four tentative world heritage sites in Argentina, Australia and Denmark and form an important part of the industrialisation and labour movements of the 1800s. They were submitted to the tentative list in 2023.
This website uses the Wikivoyage API to get and display all the information you see. This is the MediaWiki API, which is a general API for accessing data from Wikimedia projects. You can find information about it here: MediaWiki API.