A submerged village appears when dam levels drop.

Perhaps the most spectacular grotto along the Algarve coastline.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A walk through the historic city center, under the streets of Seattle.

The classic lawn figurine now claims this wooded area as home.

Only place outside China and India where two overhead DC power lines cross.

The humble beginnings of the man known for his lavish "champagne" music.

The oldest still-existing mosque in the United States sits in a remote prairie in North Dakota.