Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

Amsterdam's former hotspot for public executions and dissections.

Museum preserving torture methods from the past.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

One part local history, 99 parts gruesome haunted house.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

These fantastically named natural pools look like something out of a Scottish myth.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.