The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

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

An obelisk marks the farmhouse where the founder of Mormonism was born.

This tangled English forest looks like something right out of a fairytale.

It's said this was once the home of King James V's pet lion.

A striking glass tribute to two sisters who suffered during Scotland's "Killing Time."

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

The main residence of the Erskine family and the hereditary keeper of the nearby royal Stirling Castle.

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

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The 18th-century inspiration behind Harry Potter's Sorting Hat.

A 200-year-old collection of oddities and medical paraphernalia.

A 19th-century Neoclassical building now housing a Hindu temple represents modern-day Glasgow at its most multicultural.

This volcanic plug boasts the longest recorded history of any Scottish stronghold.

This mountain is one of the largest in Scotland but is better known for its hollow insides.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

This eclectic sanctuary is a hodgepodge of various architectural styles, all crammed into one building.

A close look reveals that the Scottish monument is just slightly off-kilter.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

The longest staircase lock in Britain.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

A double cantilever system bridge that was designed to prevent flood damage.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

Small church built in the 19th century for whites and slaves to worship together.