This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

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

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The ancient latrines of the Greeks, in all their public glory.

Seven early Christians were sealed into a cave where legend has it they slept unharmed for centuries.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

Unique tower has outlasted a takeover of the company.

One Confederate statue that accurately reflects the ugliness of its subject.

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.

Dozens of elegant ceramic tiles decorate these ancient walls, each displaying the Lord's Prayer in a different language.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The world-record holder for the longest bridge stretching continuously over water.

A stunning mosque owes its design to an Ottoman ruler nicknamed "the Butcher."

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

A more chill but no less fascinating version of the famous ancient archeological site.

A refurbished locomotive from a bygone era in the middle of the Jordanian desert.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

A whale of a public art display towers atop Juneau's cruise ship dock.