In downtown Oslo, a menacing and terrifying relief clings to a church wall.

Thousands of miniature bronze sculptures have taken over this city square creating a unique art installation.

This rocky outcrop served as a quarry for some of the bluestones that sit at the center of Stonehenge.

An abandoned mining complex in Serra do Gerês.

A secluded, little-known temple hidden amid the dense jungle.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

The ruinous former neo-classical mansion was built for Thomas Fraser of Strichen.

This stately estate house features a tower covered in a bright, modern mural.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

The oldest private art gallery in all of Hungary.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

Some people believe that this makeshift space monitoring station received transmissions from clandestine cosmonauts.

This Torino museum honors a soldier who kept the city safe using barrels of exploding gunpowder, losing his life in the process.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

This secret facility trained seals for the Swedish navy during the Second World War.

This abandoned urban warfare facility is a dream come true for airsoft and paintball enthusiasts.

Building owners can take out tiles for free at this repository for historic building materials.

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

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

The world’s first statue of the late Apple co-founder.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.