Eclectic collection of dark and macabre antiques.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

A mesmerizing disco ball-like sculpture along the Sacramento River Walk.

The decaying ruins of Wales' first asylum for the mentally ill.

This Cheshire museum has cuckoo clocks, a rare pipe organ and vintage motorbikes. But mostly cuckoo clocks.

At the United Kingdom's only residential library you can sleep among the books.

Giant statue of a disembodied head.

This Manchester laundromat is hiding something.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

The final resting place of the poets Shelley and Keats.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Architectureal fantasy quarter of Rome.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

An alchemist's "magic door" stands in the middle of a Roman park.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The heads of two giant mythological water horses honor Scotland's horselord past.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

360° views of the city plus five floors of optical illusions and hands-on science.

A 18th century graveyard and its astonishing cortege of macabre iconography.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.