The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

The largest 19th century panorama in the world still in-situ.

A miniature city, once ruled by the Queen of the Netherlands.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Graffiti covers the walls of a room where university students through the centuries have waited nervously to defend their theses.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

A former plague hospital turned medical museum.

A trio of red, white, and blue stones embedded in the streets of Leiden are markers of medieval territory and law.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

This ancient theater was once the home of fierce gladiatorial battles.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

"Drunken ship" sculpture memorializing the French poet in the city where he died.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

Historic medieval fortified city in southwest France.