The sign marks one of the endpoints to mainland Britain's longest overland travel route.

Another entry into the world of Edinburgh's pop-up artworks.

A faded reminder of what was once a common sight in London during the Blitz.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

Belfast's namesake river still winds below the city center, hidden from sight.

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

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

A British plaque explains that a house was built using the spoils of the first international golf bet.

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

The small bright red pillar survived the 1996 Manchester bombing virtually unscathed.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

This stately bank building hides a spectacular star-studded ceiling.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

Be on the lookout for the symbolic insect all over the city.

Manchester salvaged this sculpture of the adopted Mancunian when it was no longer wanted in Ukraine.

The red letters in the literary pavement leading to the library form a mysterious code.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

This peeling mural of Adam and Eve was inspired by the greenhouses at Kew Gardens.

A pair of stones embedded in an Edinburgh street memorialize one of the city's last public hangings.

Sculptor Antony Gormley used chaos theory and fractal growth to design his tallest creation.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.