A simple stone remembers one of the most menacing horses in the Swedish military.

A tombstone on the grounds of the royal castle marks the burial site of a Swedish king's beloved dog.

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

What looks like a birch tree smushed between two pieces of glass often confounds commuters.

A wooden street sign is the last remnant of this 400-year-old alleyway.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

A scale model of the world's largest existing lensed telescope.

The three colorful women depict characters from a beloved children's story.

This stone obelisk is a relic of the 17th-century Swedish mile markers.

A concrete Picasso in the middle of a student housing complex on the outskirts of Stockholm.

This Arctic mining town is home to a cat that's spent years masquerading as a fox.

A memorial to the thousands of Turkmen soldiers and civilians who died in a bloody 1881 battle.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

The dining hall that nourishes workers in Chornobyl's Exclusion Zone is also open to visitors.

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

The controversial final resting place of the equally controversial first president of Turkmenistan.

Sound travels strangely in this underground whispering gallery.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

A nomadic museum known for its art exhibitions about religion and faith.

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

A unique collection of gilded age mechanical pianos.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

This unusual elevator doesn’t stop or slow down.