Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A rare example of World War I trenches from the British front.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Macabre astrological automaton clock dating to the late 1400s.

Two stunning 17th-century libraries and a cabinet of curiosities.

Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

An intricately decorated tiny place of worship.

The first island in the world designated a light-pollution-free astronomical observation point.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

This craggy boulder is fabled to be either a druidic relic or Satan's stumbling block.

This giant geoglyph of mysterious origins is now the site of neo-pagan rituals.

One English town's celebratory landmark spurred more trouble than anticipated.

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

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

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

Decrepit Victorian public lift is a white-knuckle ride.

One of England's most famous churches hides a pair of little known architectural treasures.

The granddaddy of English geoglyphs dates back to the late Bronze Age.