A pair of stones embedded in an Edinburgh street memorialize one of the city's last public hangings.

This repurposed church offers a more literal way to get closer to the heavens.

The colorful stairs are made with marble from the world's major quarries.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

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

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

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

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.

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

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

The fountain marks the area where hundreds of accused witches were burned at the stake.

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

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

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

The former headquarters of history's oldest megacorporation.

The last of Amsterdam's original sea level markers remaining in place.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

Europe's official "zero-level," the equator of elevation.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.