This unusual elevator doesn’t stop or slow down.

This one-time health resort was used by aristocrats around the world.

Strange rumors surround the artist who created these solemn metal guard dogs.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

A beautiful drive through the foot of the Alps traces the path of 15th-century Turkish raids.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

Seat of the Duke and Duchess of Devonshire for centuries.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

The oldest residential street in Europe also features an optical illusion.

The world's largest collection of witchcraft regalia.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

Its collection includes a broad array of social, geographic, graphic design, and political history.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

The largest of London's subterranean rivers and once a mad, bad center of London life.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

This hidden green space is the city's second largest conservatory.

This historic building displays the remains of a victim of the devastating 14th-century plague.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This 1920s Dutch barge is now a floating bookstore.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.