The world's largest collection of the world's largest objects is in one small Illinois town.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

A miniature city built by a single hunchbacked monk.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

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

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

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

Northern Ireland's Brobdingnagian stepping stones.

Go deep down into the earth to experience the world of Welsh coal miners.

The castle still holds traces of the abandoned Roman fort it was built atop.

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

The most northern place on the mainland of Great Britain.

A sea cave with a waterfall and Viking past

Scotland's oldest purpose-built concert hall houses an incredible collection of ornate, centuries-old keyboards.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

In 1396, two Scottish clans that had been violently feuding for centuries finally faced off in a bloody battle in this park.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

A six-ton wedding present for the King of the Scots.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.