Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

A local dialect born in the late 19th century is only spoken in this isolated California valley.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

Trace the history of writing at this unusual North Carolina destination.

The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

At the center of an island in the middle of the Indian Ocean is a deep chasm ringed by tall waterfalls.

What might look like a cliffside sacrificial altar at first glance is actually a stone compass pointing to cities and lighthouses all around the world.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

This Tibetan monastery has survived multiple attacks and is also a sky burial site.

The ruins of an ancient Zoroastrian Tower of Silence believed to be the earliest example of the traditional funerary practice.

Thirty architectural gems from the 19th- and early 20th-century Tokyo were restored and relocated to this space.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

One of the last Jazz Age "Wonder Theaters" in New York City.

This lake in northwest Iran has started turning from green to red more frequently than scientists are comfortable with.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The largest portal tomb in Europe has a capstone weighing around 150 tons.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The ruins of this old church are slowing sinking into the sand.

The first mosque in Ghana is known as the "Mecca of West Africa."

This collection of historical artifacts and tropical wildlife waits just beneath the surface of the water.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.