A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

In this German city center, the streets have no names.

It's good luck to be mocked by this monkey.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

A monolith stands at the site of the most significant battle ever fought on British soil.

Atop this library is one of the most beautiful green spaces in Warsaw.

A tribute to the first human in space.

A historic house left in "dramatic still life."

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

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

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

The modern birthplace of Irish freedom.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

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

The lasting remains of a bygone era of open-air meat markets.

A controversial cenotaph dedicated to a local physician with an unscrupulous past.

A rare remnant of an exposition that took place nearby at the end of the 19th-century.

These formal gardens were designed to be admired from the vantage point of the castle.

A remarkable feat of Victorian engineering across the Firth of Forth.

This city square dates back to the Scottish Enlightenment and was home to some of Scotland's brightest minds.

This pyramid is dedicated to all those who suffered martyrdom for civil and religious liberty in Scotland.

The remnants of a facade from a 19th-century market stall emporium.