An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Mountain where Jesus was first tempted by the Devil.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A beautiful but toxic fountain of mercury.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

An interactive exhibition space dedicated to the kinetic sculptures of Swiss artist Jean Tinguely.

The bears of Bern have been a city highlight for over 500 years.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

A historic observatory precariously perched at the "Top of Europe."

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Dummies recreate radiological discoveries from history.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

A beautifully eclectic mix of architectural styles.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Museum preserving torture methods from the past.

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

This large, circular tomb is the final resting place of the first emperor of Rome.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

Da Vinci's equestrian statue, 500 years in the making.

Two stone columns flank the grand Venice square, but there were supposed to be three.