The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

A wonderfully eccentric Victorian-era museum and library.

In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

The ornate structure is part of a building boasting more marble than the Vatican.

This volcanic plug boasts the longest recorded history of any Scottish stronghold.

The bell that once tolled atop a lost Edinburgh gate now hangs for all to see.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

The abandoned transportation hub hides within the Glasgow attraction it once served.

These rusting, skeletal structures are monolithic monuments to Glasgow's industrial past

Once designed as a natural history museum, this building is now home to a massive art gallery.

Glasgow's memorial to the International Brigade volunteers from Great Britain who fought and died in the Spanish Civil War.

This Scottish graveyard is the final resting place of the man who inspired the character Ebenezer Scrooge.

A serene public space nestled within the remains of Glasgow’s Victorian maternity hospital

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

This unusual statue overlooking the Royal Mile has an interesting backstory.

This giant wooden treehouse within a sprawling garden has its own eatery.

This library dates back to the late 17th century and was one of the first public lending libraries in England.

The final resting place of a poisoned lover whose death was at the center of one of Glasgow's most sensational murder trials.

Glasgow's own "tipsy" temperance monument.