The shop where the girl who inspired the beloved character once bought sweets is now a book-themed commercial curiosity.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Legend says this sacred tree was a gift from goddess Athena.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This curious, round temple is the oldest still-standing marble building in Rome.

One of the world's first dedicated bank buildings in the world is now the oldest one.

This millstone commemorates a gruesome tale that may have been the source of the city's name.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

This network of narrow, medieval passages has the most delightful name.

Follow the original medieval paths that wind through this intriguing section of the city.

This cheese shop also houses a museum devoted to Dutch dairy.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.

The most loyal of little dogs, or a Victorian era publicity stunt?

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

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.