The world's first consecrated windmill.

First road tunnel in England.

These shopping center benches are actually a modern art installation.

Tucked between a side street and a theater, this arch once led to a prestigious riding school, and now opens to a courtyard and community garden.

The natural history museum displaying the British bird collections and dioramas of Edward Booth, free of charge.

This seemingly normal pathway actually forms a giant fingerprint.

This craggy boulder is fabled to be either a druidic relic or Satan's stumbling block.

These seaside shelters once enjoyed by royalty remain a part of local history.

An unassuming churchyard is the resting place of a pioneering surveyor and reluctant namesake of a mountain.

An 11th-century Viking gravestone in a Victorian parish church graveyard.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

Perhaps the most spectacular grotto along the Algarve coastline.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

The building where Mary, Queen of Scots was said to have bathed in white wine.

A series of three shiny letters mark the boundary of an old refuge for those being pursued by debt collectors.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

The Scottish Reformation leader's grave was paved over and is now a parking lot.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

A sweet symbol marks the place where torturous executions were once carried out.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

A six-ton wedding present for the King of the Scots.

The final resting place of soldiers' loyal canine companions.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.