On a trail in Portugal's Barão de São João National Forest, a pile of faces look up at hikers from the forest floor.

Before this rocky hill was home to a chapel, it was used as a lookout by Romans and Moors.

A devasting 2020 fire left this historic seminary in ruins.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

Perhaps the most spectacular grotto along the Algarve coastline.

This small chapel is built of human bones and decorated with a golden skeleton.

Reminders of the Battle of Berlin still scar the railway.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

A monument to the man who almost killed Hitler.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

Puppet theater and museum holding a collection of more than 300.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Art and a pun, all in one.

A surreal museum of extraordinary industrial objects.

The most visited, and possibly most controversial, museum in Germany.

Started as a kitchen garden, now the second largest botanical garden in the world.