The oldest Roman lighthouse still in use.

This enormous censer uses a pulley system installed over 400 years ago.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

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

Largest lake in Great Britain measured by surface area.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The location of the world's first telescope demonstration.

The Netherlands' first car tunnel has an unusually rectangular shape.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

A modern reimagining of a medieval city gate.

One of the Leiden's oldest pubs is also the birthplace of the Heineken star.

The 20-mile causeway that separates the Netherlands from the sea.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

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

The world's first interactive human body museum also serves as a chair for a giant orange man.

Colorful and chaotic stacked hotel in North Holland.