{"version":"1.0","provider_name":"Polen Travel (NL)","provider_url":"https:\/\/www.polen.travel\/nl","author_name":"magdalenastoch","author_url":"https:\/\/www.polen.travel\/nl\/author\/magdalenastoch\/","title":"Pommerse Stonehenge \u2013 steencirkels en grafheuvels - Polen Travel (NL)","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"4l51DReP4c\"><a href=\"https:\/\/www.polen.travel\/nl\/pommerse-stonehenge-steencirkels-en-grafheuvels\/\">Pommerse Stonehenge \u2013 steencirkels en grafheuvels<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.polen.travel\/nl\/pommerse-stonehenge-steencirkels-en-grafheuvels\/embed\/#?secret=4l51DReP4c\" width=\"600\" height=\"338\" title=\"&#8222;Pommerse Stonehenge \u2013 steencirkels en grafheuvels&#8221; &#8212; Polen Travel (NL)\" data-secret=\"4l51DReP4c\" 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.polen.travel\/nl\/wp-content\/uploads\/sites\/23\/2026\/06\/Kregi-Wesiory1170.jpg","thumbnail_width":1170,"thumbnail_height":780,"description":"Pommerse Stonehenge \u2013 steencirkels en grafheuvels In Polen bevindt zich de op \u00e9\u00e9n na grootste concentratie steencirkels en grafheuvels in Europa, daterend uit de 1e en 2e eeuw na Christus. Waar komen ze vandaan? Waarom zijn ze gebouwd? Waren het tempels, kalenders of misschien familiegraven van oude stammen? In de loop der jaren hebben archeologen, [&hellip;]"}