This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

The final resting place of New Orleans' most famous voodoo priestess.

A snapshot of the city's fascinating voodoo culture.

One of the world's tallest flagpoles.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

The modern birthplace of Irish freedom.

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

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

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

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

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

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

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

A roadway designed for a visiting monarch.

Scotland's first Masonic lodge may also be the oldest in the world.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

This small museum in a 17th-century building honors three iconic Scottish writers.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

The medieval town's star-shaped walls are geometrically dazzling, though not entirely impenetrable.

This star-shaped military outpost is now simply trying to protect itself from neglect.

A hidden three-foot-wide house separates these two regal churches.