A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Go deep down into the earth to experience the world of Welsh coal miners.

The castle still holds traces of the abandoned Roman fort it was built atop.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

This natural wonder is disappearing at an alarming rate.

Cliffs that hold fossils, including the earliest known reptile, dating back more than 300 million years.

Canada's subterranean Cold War museum has doubled as a movie set.

This inexpensive lodging house was once a prison notorious for its inhumane practices.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

Lost subway station nestled beneath Toronto's busy commuter line.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Hundreds of Buddhas in a re-discovered Indonesian temple.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.