There is no better way to wile away an evening, celebrate Halloween and discover more of an area than going on a scary walking tour.
Down the dimly lit alleyways, remote misty roads and spooky snickets lie treasure troves of terror - and it can be a unique way to do a bit of exploring too.
Every city has its spooky secrets, whether it's terrifying ghouls in haunted squares or gruesome history sure to fascinate fans of the macabre.
For those in need of inspiration, TripAdvisor previously shared a list of some of the world's scariest walking tours, based on travellers' reviews.
Check out the top 10 scariest walking tours in the world below - including some which are in the UK.
1. Savannah's Ghost Encounter Walking Tour, Savannah, USA
Savannah is hailed as one of America's most haunted cities, with many of its buildings said to be on top of former burial grounds.
There are plenty of spooky spots such as Sorrel Weed House where people claim to have seen figures in the windows and heard disembodied voices.
The tour takes you through the Historic District where you'll also walk by the likes of Colonial Park Cemetery, said to be Savannah's oldest burial ground, to Wright Square, where you could find vengeful ghosts.
How much? Prices from £19.39pp.
2. Ghostly Underground Vaults Tour in Edinburgh, UK
Head down into the Scottish capital's underground vaults and you'll discover why the mysterious tunnels were home to Edinburgh's criminal underworld.
The guided walking tour offers a glimpse into one of Edinburgh’s most haunted sites, where restless spirits reportedly still tread, not to mention you'll learn all about some of the city's most notorious crimes, murders and frightful tales.
How much? Prices from £13pp.
3. Haunted Stroll Through Old St. Augustine, St Augustine, USA
Go in search of spectres in Florida, following your costumed guide through the dimly lit streets.
Creep through two cemeteries and hear spine-tingling tales of the ghosts said to reside here, discover the macabre side of the Old Fort and of course get some sightseeing in with a stop at the city gates.
How much? Prices from £12.41pp.
4. New Orleans Killers and Thrillers Tour, USA
Once the sun has set, it's time to discover the spookier side of the French Quarter on this guided tour along lamplit streets and dark alleyways.
Visit some of the spots said to be the most haunted from Lafitte's Blacksmith Shop to the LaLaurie Mansion which featured in American Horror Story: Coven, to haunted bars, voodoo hot spots, true crime stories and former brothels.
NB: the tour is not suitable for children under 16 years of age.
How much? Prices from £23.23pp.
5. York Ghost Tour by Vintage Bus, UK
We know it's not technically a walking tour, but if you're short on time and want to squeeze in a quirky experience, then this one-hour tour might be just the ticket!
Board the ghost bus, and prepare for a ride through the dark, narrow streets during which you'll hear chilling tales about the city, from notorious crimes to sinister doings and haunted spots.
How much? Prices from £15pp.
6. Northside Ghost Walk Tour in Dublin, Ireland
Discover Dublin's sinister side with a tour through the city's former Viking enclave, St Mary's Abbey and plenty more historic sites - including the former site of one of Dublin's most haunted houses.
Listen to tales of Lord Norbury, the sadistic hanging judge, the vicious Robert Emmet, and the legend of Scaldbrother, an infamous medieval thief whose stolen treasure is said to still be hidden in the labyrinth of chambers beneath the city.
How much? Prices from £13.40pp.
7. Edinburgh Famous Underground Ghost Tour, UK
Edinburgh's underground tunnels are the stuff of legend, having been home to the city's criminal underworld in times long gone.
On this tour you'll discover the terrifying tunnels, but first you'll get to make the most of Edinburgh's Old Town with a walk through the shadowy lanes and cobbled courtyards, hearing tales of crimes and ghouls sure to give you goosebumps.
How much? Prices from £10pp.
8. Night Time Alchemy and Mysteries Walking Tour of Prague's Castle District, Czech Republic
Get ready for a tour of the Czech capital that's filled with mystery, alchemy and magic. But we're not talking 'bunny out of a hat' magic; think dark arts and intriguing alchemists with a taste for the unusual.
This night-time tour lasts about two hours, but it's packed with plenty of historic tidbits and fascinating tales as well as all of the spooky offerings.
How much? Prices from £17.86pp.
9. Port Arthur Ghost Tour, Australia
This after-hours tour of the Port Arthur Historic Site offers a glimpse into ghoulish stories and eerie ruins that make up this world-famous spot, where over 2,000 paranormal experiences have been encountered.
You'll only have the light of lanterns to guide you as you look out for disembodied voices and ghostly footsteps, while your guide explores the turbulent history of the site including the Port Arthur Massacre.
How much? Prices from £14.51pp.
10. Paris Catacombs Special Access Tour, France
Skip the long entrance lines and head straight into the tombs where your guide will delve into the fascinating history of these shadowy tunnels.
Venture deep underground and gain access to chambers which are off-limits to other tourists including a secret chapel decorated with skulls and femurs.
With skulls and bones stacked in decorative piles, the eerie labyrinth of tombs is still home to the remains of some 6 million Parisians.
How much? Prices from £70.56pp.
