The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Twisted buildings adorn the banks of the Rhine river.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

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

A German apartment building hosting as many trees as human occupants.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This tribute to the 16th-century composer is now an unusual shrine to Michael Jackson.

The prototype for all Nazi concentration camps.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

A famous burial ground with a history both grim and literary.

An artistic tribute to the famous singer, just around the corner from where he was born.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

London's smallest police station is barely the size of a phone booth.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This massive monument has been telling the time for 150 years—at a slight angle.

It was once nicknamed "the most bombed hotel in Europe."

The last Victorian market in Belfast.

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

The only monument to name all of the passengers and crew who died on the RMS Titanic.

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

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.