An oddly shaped tower built to mark the acquittal of Admiral Keppel in a controversial 1770s case.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

This metal installation is a tribute to an ancient megalithic structure and South Yorkshire's steel history.

It's known as the "Full Monty school" thanks to its role in the beloved British comedy film.

Seemingly straight out of a fairy tale, a steel chair sits on a tiny island only accessible by stepping stones.

The collapse of the brand-new dam caused one of the worst floods in British history.

The whimsical steel spider lurking in the shadows of this suspension bridge shows that engineers can have a sense of humor.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

Real bones which are said to have belonged to a Polish dragon.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

The stately remains of Llywelyn the Great's mighty fortress.

The community pools that the community refused to give up on.

Glasgow's own "tipsy" temperance monument.

Glasgow’s piece of the patron saint of love.

The ornate structure is part of a building boasting more marble than the Vatican.

The world's oldest surviving music hall was also once a freakshow.