Iranian tombstones shaped like male and female sexual organs.

It's bad manners to eat and drink on the subways of Tokyo, unless the train is this bar. 

An enchanting rocky island of scraggly baobabs surrounded by an ancient sea and sprawling salt pans.

The petrified remains of 150-million-year-old trees can be seen in and among the houses of the local villagers.

Tracks of ceratosaurus and Coelophysis rhodesiensis tracks can be found fossilized in the sandstone near Mt. Etjo.

Road signs in Namibia mark the location of one of the five major circles of latitude.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

This church is named for one of the most dramatic tales in the early Christian church.

After 400 years of being closed to the public, this monastery's underground tunnels and secret garden are now a museum.

Dynastic Home of the De Piro Family.

A centuries-old forgotten underworld lies beneath Malta.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

This disused church, left to the elements of the Arctic Circle's forests is open for exploration.

A beautiful Arctic museum and nature center preserves the culture of the Sámi people.

The gnarled remains of an exploded German bunker from World War II sit along a breathtaking fjord.

The largest cave in Northern Europe.

The world's largest underground iron ore mine.

The largest camel market in West Africa

Initially meant to immortalize the valor of the colonizer, this monument is now a symbol of Mauritanian resistance.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents