This striking icon of the disputed Republic of Artsakh caused a stir at a Eurovision Song Contest.

A shrine of fire worship built on top of a natural flame.

Mysterious hillside with a continuously burning natural fire.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

Singapore's landscaping project is home to 18 incredible Supertrees.

Hang out with thousands of butterflies in one of the world's largest such enclosures.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Home to three historic ships from the age of Vikings.

An intricately carved Viking church overlooks a glistening fjord.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

This 13th century Gothic brick castle is the largest in the world by surface area.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

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

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Real bones which are said to have belonged to a Polish dragon.

An underground city of salt.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.