A medieval fortress on a rock in a canyon of the Smotrych river, the most dramatic castle in Ukraine.
Constantine the Great's birthplace, the Ottoman Skull Tower and Serbia's capital of grilled meat.
Portugal's oldest city and its religious heart, with the baroque stairway of Bom Jesus do Monte.
A medieval Firewatch Tower over a Gothic and baroque centre on the Austrian border, next to Lake Neusiedl.
The first Ottoman capital under Mount Uludag: the Green Mosque, the silk bazaar and Iskender kebab.
A town of stairs, a Mimosa festival in February and three fortresses at the mouth of the Bay of Kotor.
Baroque palaces facing Our Lady of the Rocks, an artificial island built from sunk ships and stones.
Rozafa castle above the largest lake in the Balkans, the bicycle city and the gateway to the Albanian Alps.
Two castles face each other across the river โ Estonian Hermann and Russian Ivangorod โ on the EU border.
A baroque city built of black lava at the foot of Etna, with the loudest fish market in Sicily.
A walled medieval town at the end of a fjord-like bay, with 1,350 steps up to the fortress of St John.
A baroque old town at the meeting of three rivers, halfway between Vienna and Budapest.
Forty Byzantine churches on a rocky peninsula tied to the mainland by a causeway.
The Leaning Tower is one of four marble buildings on the Field of Miracles; the rest of the city is a student town.
The 'city of love' on a hill above the Alazani valley, inside 18th-century walls in the Kakheti wine region.
A German-built port on the Baltic, the ferry to the Curonian Spit and its sand dunes.
The Castle of St Peter built from the Mausoleum's stones, wooden gulet cruises and the Aegean nightlife.
Medieval defence towers in the high Svaneti valleys, the base for treks to Ushguli and glaciers.
A Greek theatre with Etna and the sea as backdrop, and the town that hosted The White Lotus.
Roman mosaics, the Tombs of the Kings and the rock where Aphrodite came ashore.
The Basilica del Pilar on the Ebro, Goya in the museums and the Aljaferia Moorish palace.
Rumi's tomb and the whirling dervishes, the Seljuk capital in the middle of Anatolia.
Early Christian tombs, a mosque turned church on the main square and Zsolnay ceramics.
The Azores' main town, gateway to crater lakes, hot springs and whale watching in the mid-Atlantic.
The Vitkovice ironworks turned festival ground and the Stodolni street of a hundred bars.
Goethe's and Schiller's houses, the birthplace of the Bauhaus, and Buchenwald on the hill above.
Victorian arcades, the Royal Armouries and the gateway to the Yorkshire Dales.
The capital of the Westfjords on a spit of sand between mountains, the start of Hornstrandir hikes.
Vermeer's canals, Delft Blue pottery and the tomb of William of Orange in the New Church.
Britain's smallest city: a cathedral in a hollow where the patron saint of Wales was born.
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