The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

Conspiracy theories and occult legends surround this mysterious natural rock formation.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

This mesmerizing architectural wonder will take your breath away with its unusual color patterns.

Turntable anonymously received orphans, alms, and groceries.

A little sculpture with a large wardrobe.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

This Transylvanian church has changed its denomination four times.

An ancient iron pillar in Delhi that seems to be rustproof.

The world's second-largest sundial, made entirely out of stone.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

This tree was extinct for a thousand years before sprouting again from a 2,000-year-old seed.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This cemetery features modernist statues as strange as its name.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

Macabre astrological automaton clock dating to the late 1400s.

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This stunning mass of ice spans 121 square miles and is still growing.

This nightmarish children's plaything was left grotesque to help kids conquer their fear.