Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

Even though some of the buildings date back to the Victorian era, this research institute is still involved in cutting-edge astronomy research.

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

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

A succession of eerily contemplative iron figures lead from a Scottish museum to the sea.

The last remaining bottle-shaped kilns in Scotland stand alone in an Edinburgh suburb.

A secret garden in a picturesque Edinburgh village has inspired artists for centuries.

This tiny weathered plot is one of the oldest Jewish cemeteries in Scotland.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.