A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

This ancient holy well is older than much of the city that surrounds it.

Parts of the civil rights movement unfolded in this historic eatery, helmed by the "Queen of Creole Cuisine."

The final resting place of the great navigator, or maybe his brother.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

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

Rainbow-hued local gem in Venice.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

The carved medieval stones stand near the ruined abbey's parking lot.

This medieval manor house was equipped with secret compartments for hiding priests.

In 1329, Christine Carpenter entered this small stone cell in the hopes of becoming a living saint.

Venice's "Island of the Mad."

The camera-toting gargoyle juts out from the exterior of a Gothic cathedral.

You’ll feel like you’ve gone through the looking glass at this contemporary art museum filled with glass sculptures of every size, shape, and color.

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

The oldest stone house in Paris was built by its most famous alchemist.

A boulder in the Churchyard of Down Cathedral marks the legendary burial place of "The Apostle of Ireland."

This North African stone complex is considered to be the oldest astronomical observatory on Earth.

The medieval ferry service has been going strong since the 14th century.

More than a century old, this trading post resides in the Navajo Nation.

This popular pitstop lives up to its name.

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