A Spanish artist builds his own castle.

This store decorated with Japanese and underground pop culture items has been the centre of Barcelona alternative fashion scenes for more than a decade.

Week-long block party becomes a competition for the best decorated street.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

This semi-secret storybook hedge maze is also the oldest garden in the city.

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

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

An open-air "garden" of mural art that changes weekly.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

This fountain was designed to honor the man who helped bring water to Barcelona.

A stately palace has been converted into the world's largest cannabis museum.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A terrific purveyor of natural history objects and curios.

A pair of gigantic baby heads greet passengers at Atocha Station.

The lengthy skeleton of one of the tallest Spaniards of all time is on display in Madrid.

Eclectic architecture in the woods of New York.

It is one of the few places in Rochester that has both Union and Confederate soldiers buried and honored.

A cheese discovery made by shepherds became the pride of a region.

The tallest tower in Cáceres's Old Town.

Fragments of human bones are embedded in the walls of this quaint alley.

A strange anthropomorphic stele with a mysterious inscription that has never been deciphered.