The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

One man's quest for the ultimate road trip vehicle.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

A beautifully eclectic mix of architectural styles.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

The attic of a four-century-old canal house hides a clandestine church.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

The world's only museum devoted to the wonders of fluorescence.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Bridge that died in war and was resurected.

Gargoyle head that brings good luck.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

An ancient knight and a symbol of the city's freedom.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

The best place in the world to buy tinned fish.