A lush indoor jungle fills this bustling Madrid transportation hub.

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

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

A historic shipbuilding town is home to a sail-through fish-and-chips shop.

Inside this art museum resides one of Glasgow's most famous musical instruments.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

Glasgow's own "tipsy" temperance monument.

An angelic, yet demonic-looking figurine presides over one of Glasgow's most ancient streets.

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

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

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

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

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

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

A scattered trail of street art adds a pop of color to the city's stark structures.

The largest terracotta fountain in the world, built to commemorate Britain’s Victorian achievements.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

This colorful statue welcomes visitors to a Barcelona park.

An early 20th-century bullring converted into a modern shopping center.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A Spanish town built into the cliffs.