The world's longest continuously running show has played at this small West End theater since 1974.

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

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

There has been an astronomical clock on this spot since the 14th century.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

Designed as a reminder of one of the darkest moments in Austrian history.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

Legends surround an ancient tree trunk riddled with nails for good luck.

Dine amidst exotic plants at this former royal greenhouse.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Baroque celebration of the end of the Great Plague of Vienna.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

There's an exclusive Beefeaters pub hidden in the Tower of London.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Giant, pink stuffed rabbit on an Italian mountain.

The location of a citizen uprising that led to a gruesome act of mob justice.

Many of Edinburgh's more unsavory characters spent their final days behind this door while awaiting their executions.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

The colorful stairs are made with marble from the world's major quarries.