Wonderfully preserved Victorian factory, complete with a preserved steam powered engine house.

Harry Potter’s Hogsmeade Station is also a charming blast from the past situated in North Yorkshire.

An intriguing three-sided folly is a testament to one man's devotion to Catholicism and the number three.

Journey through this open museum where even employees remain true to period.

The sign at the garden gate reads: “These Plants Can Kill.”

The photographs of "fairies" that fooled much of the world (including the creator of Sherlock Homes) were taken at this English stream.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

An incredibly well-preserved piece of ninth-century Viking poop.

Hamburgers are intensely proud of their tunnel beneath the river.

Model Trains and Much More in Hamburg.

Follow the original medieval paths that wind through this intriguing section of the city.

A century-old tradition has culminated in a small but singular collection of feline effigies.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

One of the shortest streets in York has an especially odd name.

The designer of this railway tunnel added a birthday present for himself.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

An enormous steel waterfall is a nod to the substance that shaped Britain's Steel City.

This huge abandoned fortress hidden inside a mountain holds a world of subterranean secrets.

This secret Swiss fortress is disguised as a harmless pink house, complete with fake windows.

This long line of cement defensive wedges is named after the famous chocolate bar for obvious reasons.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.