A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

This ruined fortress was the stronghold for a persecuted medieval leader and his infamous Assassins.

This circular Iranian jail was once a political prison run by the country's secret police.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.