{"version":"1.0","provider_name":"Castle Ruins &amp; Velvet Cave","provider_url":"https:\/\/www.kasteelvalkenburg.nl\/en\/","author_name":"James Robinson","author_url":"https:\/\/www.kasteelvalkenburg.nl\/en\/author\/james-robinson\/","title":"Organization - Castle Ruins &amp; Velvet Cave","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"NwH60GuLuu\"><a href=\"https:\/\/www.kasteelvalkenburg.nl\/en\/about-us\/organization\/\">Organization<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.kasteelvalkenburg.nl\/en\/about-us\/organization\/embed\/#?secret=NwH60GuLuu\" width=\"600\" height=\"338\" title=\"&#8220;Organization&#8221; &#8212; Castle Ruins &amp; Velvet Cave\" data-secret=\"NwH60GuLuu\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\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\/\/# sourceURL=https:\/\/www.kasteelvalkenburg.nl\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/www.kasteelvalkenburg.nl\/wp-content\/uploads\/2020\/10\/Kasteelgrot-organisatie_1.jpg","thumbnail_width":1440,"thumbnail_height":662,"description":"Marlstone This is no easy task, for several reasons, not least because the former Valkenburg Castle is hewn from marlstone, which makes any restoration works prohibitively expensive. The Velvet Cave also requires extensive maintenance to guarantee safety. Group activities Both locations can be visited year-round (preferably together, but can also be visited individually). The site [&hellip;]"}