Founded in 1806, Warsaw's main Jewish Cemetery incredibly suffered little during WWII and contains more than 150,000 tombstones, the largest collection of its kind in Europe. A notice near the entrance lists the graves of many eminent Polish Jews, including Ludwik Zamenhof, creator of the international artificial language Esperanto.

Be sure to look for the tomb of Ber Sonnenberg (1764–1822), one of Europe’s finest funerary monuments; take the first paved path on the left beyond the ticket office and when you arrive at a junction on your right, look left: it’s the roofed structure over by the wall.