A striking symbol of the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

Recently restored menagerie of Victorian-era beasts.

The remains of a small medieval chapel mark the legendary birthplace of the patron saint of Wales.

Go back 50 years with a turn on one of the park's carefully restored vintage fairground rides.

Several land speed world records were shattered at this Welsh beach.

This former military airfield's claim to fame came from a lucky accident during the Second World War.

The ruins of an ancient Zoroastrian Tower of Silence believed to be the earliest example of the traditional funerary practice.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

Mysterious hillside with a continuously burning natural fire.

This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

Destruction from Armenia's 1988 earthquake inspired an artist's sculptures of scrap metal.

Decorated with a staggering 1,380 ladybugs, the installation has turned what was once a grim, forgotten nickel mine into a landmark and a statement.

A museum dedicated to secret surveillance.

A memorial to the atrocities of the People's Socialist Republic of Albania.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

This 15th-century Ottoman bridge was modified to keep up with the changing course of the river Erenik.

Visit the last surviving outlet of a once popular chain of coffeeshops.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

This lonely minaret with an unusual decorative symbol is all that remains of a historic Ottoman mosque.