An abandoned canal route lies hidden under the streets of Manchester.

A tiny, heartwarming piece of art hiding in plain sight.

This dreamy street will transport you to wintertime in Victorian England.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

Despite having a dome made of papier-mâché this tiny observatory has survived for over a century.

A 16th-century castle unexpectedly nestled within a post-war housing development.

This once-majestic, now-abandoned Victorian castle has seen better days.

The ruins of a 15th-century church once home to priests who prayed for a single family's salvation.

The ruins of the second of three churches dedicated to the saint in a touristic Scottish town.

These ruins of a medieval church are full of architectural mysteries.

The location of this historic castle was inspired by a donkey.

This 1,300-year-old marker is one of the finest and most complete early Christian crosses in Scotland.

A mysterious ruin shrouded in more folklore than fact.

The ruins of a medieval seminary some say is the oldest university site in Scotland.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

Enter the world under the hill at this ancient UK burial chamber.

This Scottish manor house is a lush relic from the life of a literary great.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

The remains of a grand castle that may have inspired Bram Stoker's Dracula.