This mansion oasis contains gardens, sculptures, and fountains just off the busy Plaça Kennedy in Sant Gervasi.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

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

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

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

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

This Michelin-starred restaurant sheds light on a rare period of cultural and culinary tolerance in Cordoba’s past.

Saint Joseph was said to heal the deaf and blind, but it was a much smaller miracle that got him canonized.

Mountain where Jesus was first tempted by the Devil.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

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

This cemetery features modernist statues as strange as its name.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

This pub built its reputation pouring post-shift pints for employees of the cemetery with which it shares a wall.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

One of Ireland's most infamous prisons for rebels including men, women and children.

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

Con Edison’s exotic and heat-loving pests.

A corkscrew-shaped barn in Ireland.

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

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

A whimsical, but often overlooked clock in Park Avenue.