Halloween is no longer just an excuse for cheap costumes — a growing number of travellers plan entire trips around the world's most unsettling places. A recent roundup of spooky destinations makes a solid case for booking an October 31 getaway, and the list spans four continents.

The most atmospheric pick is Poveglia, a disintegrating island in the Venice lagoon often labelled the most haunted in the world. It actually comprises three landmasses, including a 14th-century octagon fort on ground made for a plague quarantine station — hence the grim stories about the dead. You can't land there without special permission, so the move is a slow boat past the moorings as dusk falls. Down the Adriatic in Romania, Bran Castle near Brasov trades genuine plague history for gothic fiction: Bram Stoker never visited Transylvania, but his research was so meticulous that Bran matches his description of Dracula's castle uncannily well. Vlad the Impaler — the real historical Dracula — was only ever imprisoned there, briefly, in 1462. The castle runs an annual Halloween event that runs into the early hours, and it sells out.

Britain offers two very different kinds of dread. In Edinburgh, the 18th-century South Bridge vaults beneath Blair Street are a fixture of the city's ghost tours, thanks in part to a phantom called Mr Boots, a tall figure in a blue raincoat who reportedly orders visitors out. Elsewhere in the city, look for the Black Mausoleum at Greyfriars and the 16th-century White Hart Inn, where Burke and Hare found some of their victims. Over in Buckinghamshire, the Hellfire Caves at West Wycombe were dug in the 1740s as a meeting place for Francis Dashwood's notorious club, whose members supposedly ranged from black magic to debauchery — Benjamin Franklin among them. Today you can book the caves for late-night dinners, and Halloween brings an adults-only event with staged scares and mood lighting.

For something quieter and stranger, Kutná Hora in the Czech Republic — a UNESCO-listed town about 50 miles east of Prague — is home to the Sedlec Ossuary, a small church decorated with the bones of an estimated 40,000 people. Chandeliers, archways and coats of arms are all built from human remains, assembled largely by a 19th-century carpenter named František Rint. It's treated as a holy site rather than a haunted one, which somehow makes it more affecting.

And if you want genuinely bizarre, head south of Mexico City to the Island of the Dead Dolls in Xochimilco's wetlands. Their caretaker, Don Julian Santana Barrera, spent decades hanging thousands of decaying dolls from trees and fences before his death in 2001, reportedly to appease the spirit of a drowned girl. Most boats skip the island, but a few xochimilco boatmen will take you on request.

Not every spot on the list suits a casual weekend — Poveglia and the doll island take some arranging — but Bran Castle, Edinburgh's vaults, the Hellfire Caves and Kutná Hora are all easy to fold into a short autumn city break, and each leans hard into the season.