An American ghost town hides along a side street in Scotland's capital.

This series of Scottish caves has no clear purpose other than baffling historians.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

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

This king penguin is a knighted brigadier of the Norwegian Army.

Long abandoned underground complex to keep royals safe from a nuclear war that never came.

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

Small museum dedicated to the founder of electromagnetic theory.

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

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

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

A library where thousands of books explain how to avoid another Great Recession.

An eccentric aristocrat brought these Australian natives to their current Scottish home.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

Scotland still bears an enormous scar of its Roman past.

This Arcadian garden in the Pentland Hills boasts over 270 artworks by Scottish artist and poet, Ian Hamilton Finlay.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

This tiny island is home to the world's largest colony of Northern gannets.

At high tide this strange footbridge appears to have no purpose whatsoever.

Ruined castle with subterranean vaulted Goblin Ha' or "Goblin Hall."

A poignant memorial shows the widows and children left heartbroken by the worst fishing disaster in Scottish history.

Legend says this rock was once a chopping block for public executions.

The mystery of this small, brick pond eluded its possibly only investigator until his death.