Fortified homes of highland warriors that are still in use today.

These Stalin-era industrial 'death traps' hang lifeless above the city

Small church on top of a huge rock column.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

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

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The oldest operating pharmacy in the world features 800-year-old recipes.

The largest and most famous wax anatomical collection anywhere in the world.

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

A corkscrew-shaped barn in Ireland.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

Obelisks and stone pineapples in the Irish countryside.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A church of bones, decorated with 40,000 human skeletons.

The excellent acoustics of this natural amphitheater made it a popular preaching spot for the founder of the Methodist Church.