Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The fountain marks the area where hundreds of accused witches were burned at the stake.

People leave coins atop an unusual grave marker in one of Scotland's oldest burial grounds.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

These Roman ruins in England’s Lake District are 2,000 years old, but look pretty good for their age.

The highest peak in all of England is plagued by dangerously fickle climate shifts.

Buying your medicine at this particular pharmacy is like taking a trip back in time.

Built for the 1962 World Cup, this fully functioning botanical clock is still ticking.

A whimsical European-style chateau that calls the coast of Chile home.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

Rare remnants of the brick-domed ovens birthed in the Durham coalfield during the Industrial Revolution.

Journey through this open museum where even employees remain true to period.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

A museum pays tribute to the glass-making industry of Sunderland.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chernobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The dining hall that nourishes workers in Chernobyl's Exclusion Zone is also open to visitors.