Visit the Ateshgah fire temple

Fifteenth-century royal complex at the heart of Baku’s walled old city.

Sunken Byzantine reservoir under Istanbul, its columns rising from black water.

Trio of flame-shaped skyscrapers that light up Baku’s skyline at night.

Summer palace of stained-glass shebeke windows, built without a single nail.

Underground cathedral carved into the tunnels of a working salt mine.

Visit the ancient cave monastery complex of Dawid Gareji in Georgia

Visit the historic wooden mosque in Kruszyniany, one of the oldest Tatar mosques in Poland, dating back to the 18th century.

The largest surviving Romanesque church in Europe, built for pilgrims on the road to Santiago and topped by a five-tier octagonal bell tower.