The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Hidden beneath the streets of London is a secret subway that only carried mail.

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

This peculiar museum offers hands-on interaction with seemingly intangible principles of mathematics.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

The oldest olive tree in Greece has been bearing fruit for at least 2,000 years.

Where, exactly, the great aviator completed her transatlantic flight has caused some trouble in Wales.

The entire known universe of the ancient Etruscans is held inside this bronze model of a sheep’s liver.

No one knows why ancient labyrinths were built on this tiny northern island.

Where experiments are conducted on all things wood.

The ghostly remains of what was once the world's richest copper mine.

The most powerful waterfall in all of Europe.

A massive Celtic cross secretly growing in an Irish forest.

Wax models of disease and deformity are on display at this German medical museum.

This shrine to the patron saint of Alaska sits on a small tidal island and was built from the land’s own beach stones.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

Thanks to this small string of islands World War II still hasn't officially ended between Russia and Japan.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Monument to the cotton-destroying boll weevil.

While most books are made of wood, these wooden books are truly made of, and all about wood.