We could probably put the entire city of Barcelona on this list, and we’re confident locals would agree. The city's 1.6 million inhabitants are dwarfed by its 32 million annual visitors, leading to widespread protests by residents who feel overrun. Central boulevard Las Ramblas is now 90% tourists and 10% pickpockets (locals avoid it like the plague), while anti-tourist slogans adorn downtown bus stops and walls.

The city owes much of its popularity to the works of Antoni GaudÍ, and his buildings face varying fortunes. The majestic spires of the Sagrada Familia retain their good looks despite the crowds, but the tourist crush at Park Güell – sculpted gardens best enjoyed on a tranquil stroll – would have the Catalan master turning in his grave.

The world's most disappointing tourist sights, ranked