{"version":"1.0","provider_name":"Poland Travel (EN)","provider_url":"https:\/\/www.poland.travel\/en","author_name":"Poland Travel (EN)","author_url":"https:\/\/www.poland.travel\/en","title":"Wieliczka and Bochnia Royal Salt Mines - Poland Travel (EN)","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"SUCJT5rJNA\"><a href=\"https:\/\/www.poland.travel\/en\/wieliczka-and-bochnia-royal-salt-mines\/\">Wieliczka and Bochnia Royal Salt Mines<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.poland.travel\/en\/wieliczka-and-bochnia-royal-salt-mines\/embed\/#?secret=SUCJT5rJNA\" width=\"600\" height=\"338\" title=\"&#8222;Wieliczka and Bochnia Royal Salt Mines&#8221; &#8212; Poland Travel (EN)\" data-secret=\"SUCJT5rJNA\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/* ]]> *\/\n<\/script>\n","thumbnail_url":"https:\/\/www.poland.travel\/en\/wp-content\/uploads\/sites\/17\/2023\/02\/Wieliczka-kaplica-sw-Kingi-3.jpg","thumbnail_width":1920,"thumbnail_height":498,"description":"Since a very long time ago, thanks to the process of evaporation, salt was obtained from naturally occurring brine springs. At some point the springs dried out and that was when \u201cthe Borlach rule\u201d came into effect. Formulated by the advisor on mining issues of the Elector of Saxony, engineer Johannes Borlach, the rule stated: [&hellip;]"}