The ancient tomb acts as a calendar that keeps perfect time.

A remarkably intact castle that once was the largest in Ireland.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

An old department store turned Nazi prison turned artist commune.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

The world's oldest known salt mine.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

An Austrian house of bones filled with hundreds of intricately painted skulls.