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

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

The oldest inn in England served brew to the crusaders.

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

An intriguing three-sided folly is a testament to one man's devotion to Catholicism and the number three.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

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

This bridge later moonlighted as a local jail.

The plaques around this 19th-century structure recall some rather strange tales.

This section of the Kennet and Avon Canal has been designated the same level of heritage protection as Stonehenge.

Where Agatha Christie mysteriously disappeared in 1926.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

Eyam took steps to quarantine themselves and keep the plague from spreading.

This incredible viaduct was part of the Victorian railway boom and helped the Midland Railway navigate tough terrain.

Stonehenge has nothing on Castlerigg’s views.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

These upturned herring boats make nifty storage sheds for fishing goods.

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

The sign at the garden gate reads: "These Plants Can Kill."

This giant wooden treehouse within a sprawling garden has its own eatery.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

This tiny traditional smokehouse is the only one left in this historic fishing port.