A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

At the United Kingdom's only residential library you can sleep among the books.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

A breathtaking flower tunnel bursts with beautiful golden blossoms.

A subterranean playground in an abandoned slate mine.

A bookstore dedicated to the intersection of comedy and art.

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

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

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

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

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

Mountain where Jesus was first tempted by the Devil.

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

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

This colorful and fiery mural depicts the Irish folk story of the beloved hero Cuchulain.

Fantastic stainless steel dragon gates complete with mesh wings.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.