Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Elaborate tile work in this railway station tells the story of Portugal.

One of the largest museums in Ukraine remembers the story of the German-Soviet War in iconic, brutalist style.

The deepest metro station in the world.

340-foot statue built to honour the Heroes of the Soviet Union.

Rusted cars, trucks, and buses form a fascinating collection of Soviet-era machinery.

The first museum dedicated to exploring humanity's cultural relationship with the celestial world.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

Mysterious craters may have been home to an ancient cult.

Wars fought and wars won are remembered by these abandoned bunker ruins.

A wooden replica of France's famous tower.

The gutted remains of this Estonian mansion are a monument to a tragic love.

Hundreds of unusual wheel crosses poke above the earth in this small Estonian cemetery.

Longest fortress system anywhere in Europe.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

A tiny church on a man-made island in the Adriatic.

Rocky Atlantic beach home to a stunning stone arch.

Mountain where Jesus was first tempted by the Devil.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

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

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.