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

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

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This might just be the TARDIS of bookstores.

Pennsylvanian mass grave and possibly mass murder.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.