Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

The remains of Crystal Palace Great Exhibition of 1851.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

This small Irish village suffered the greatest loss of life when the Titanic sank.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

The modern birthplace of Irish freedom.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

A hugely vast Irish landscape of barren rock that stretches for miles.

The oldest public library in Ireland.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

An ancient neolithic tomb that only sees the sun twice a year.

The ancient tomb acts as a calendar that keeps perfect time.

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

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A hands-off space for graffiti artists to hone and display their skills.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.