Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

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

Amsterdam's former hotspot for public executions and dissections.

A line number in Amsterdam that will likely never be used again due to its tragic history.

The former headquarters of history's oldest megacorporation.

Where royalty waits in the height of luxury.

This early version of the guillotine was used to execute the man responsible for its construction.

Anonymously sculpted and donated, these sculptures made from poetry books and pages are sprinkled around the city.

This extraordinary Viking artifact has traveled throughout the city.

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

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

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

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

Lavish royal estate punctuated with heated greenhouses.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Museum preserving torture methods from the past.

A floating cat sanctuary on an Amsterdam canal.

The world's only museum devoted to the wonders of fluorescence.

This mesmerizing medieval monastery-cave complex sits thousands of feet above ground overlooking a valley.