If the crowds of Google reviewers are anything to go by, Prague Castle remains Europe's favourite fortress-palace. A new ranking of the continent's 30 most popular castles and palaces, compiled by TUI Musement using accumulated Google reviews, places the Czech landmark first for 2026 — and it's not resting on its reputation. The site has picked up 31% more reviews since 2023, now sitting at around 199,000.

The timing matters. The European Travel Commission reports that culture and heritage are among the main motivators for travellers heading away this autumn, and TUI Musement's own survey found 94% of people are interested in history or heritage experiences on their next city break.

The Czech capital's giant complex — among the largest palace complexes in the world — earns its top billing on sheer substance. One ticket covers St Vitus Cathedral, the Old Royal Palace and Golden Lane, so you get centuries of history in a single visit.

Buckingham Palace takes second, with its daily Changing of the Guard and summer openings of the state rooms. Austria scores a strong year: Schönbrunn Palace in Vienna climbs two spots to third, marking 30 years since its UNESCO World Heritage listing. France's Palace of Versailles holds fourth, home to the Hall of Mirrors and gardens built for the kings of France. Kraków's Wawel Castle, once dropped two places to fifth but remains a heavyweight — it's where Poland's kings were crowned, and the Dragon's Den statue sits at its foot.

Spain has the deepest bench on the full list, with six of the 30 entries. Granada's Alhambra, the former seat of the Nasrid sultans, ranks sixth, while the Royal Palace of Madrid climbs one to seventh after a 47% jump in reviews — it still hosts royal receptions, but visitors can tour the throne room and royal chapel. London reappears at eighth with the Tower of London, home to the Crown Jewels and centuries of grim royal history. Neuschwanstein in the Bavarian Alps, King Ludwig II's fairy-tale fantasy, rises to ninth, and Bran Castle in Romania — the so-called Dracula's Castle — rounds out the top ten.

One newcomer broke into the 2026 list: Buda Castle in Budapest, which saw a 65% surge in accumulated reviews compared with 2023.

For travellers, the ranking doubles as an autumn city-break shortlist. October and November mean shorter queues than peak summer at most of these sites, and cooler weather suits the amount of walking involved — Versailles' gardens alone can eat a day. If you want to follow the list, note that several of these (Buckingham, Alhambra, Neuschwanstein) require advance timed tickets, so book ahead rather than turning up.

Whether you're drawn by imperial Vienna, Nasrid Granada or Transylvanian vampire lore, the data suggests you won't be short of company.