Quito's historic, main square dates back to the 16th century.

It took 160 years to complete the most ornate church in Ecuador.

The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.

A turquoise lake within a volcanic crater.

A swing to dangle you off the very edge.

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.

This one-time health resort was used by aristocrats around the world.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

Where commuters walk through remnants of an ancient Greek necropolis.

This magnificent Art Deco church is a reflection of Lithuania’s turbulent history.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

This striking structure is the Socialist-modernist centerpiece of a former Soviet spa resort.

An abandoned masterpiece of Soviet Brutalist architecture.

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

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

The last Victorian market in Belfast.

The only monument to name all of the passengers and crew who died on the RMS Titanic.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

Climb to the top of its spiral spire for spectacular views of Copenhagen.