A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

A 2,000-ton rock resting in a state of a delicate balance.

Britain's tallest megalith towers over the cemetery of a quiet English village.

This Victorian marvel of engineering and artistic prowess is nicknamed the "Cathedral of Steam."

The medieval-looking hammer beam teak roof may be a Victorian vanity, but it's still absolutely magnificent.

These planks were originally installed to hold the dead.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

Some of England's last cave dwellers lived and worked within this huge cave.

WWII artifacts, including the building itself.

One of Oxford's greatest treasures likely belonged to the legendary King Alfred the Great.

These barriers stand as stark reminders of Northern Ireland's troubled past.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

The undercroft is a spectacular example of medieval Cistercian architecture.

These ancient symbols freckling a Scottish cliff remained hidden for centuries.

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

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

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

This amazing trail among the many waterfalls around Ingleton has been enchanting visitors since 1885.

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

The bizarre headgear looks like it was made for a fool, not a king.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

A striking 500-year-old mansion provides an unexpectedly sublime home for live deer and a menagerie of exotic stuffed animals.

Huge winged monument in the United Kingdom.