A serene temple with stunning stained glass hides in downtown Dallas.

This unique wooden mosque resembling a Chinese pagoda was said to be built without the use of nails.

Old vessels have been transformed into artistic canvases in this unusual cemetery.

The unfinished final resting place of some of Spain's most prominent politicians.

The "birthplace of insulin," where Sir Frederick Banting realized the hormone could save the lives of Type 1 diabetics.

A historic holy well hidden near a charming English park.

Yup, that's a 330-foot yacht passing over the highway.

A solemn reminder of the infamous World War II war crime that massacred almost all the men in a small Greek town.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

A staircase made of gravestones leads up to this church built into a giant rock.

The massive steel ring looks like it could be China’s first Stargate.

This castle has links to Portugal’s founding and struggles for independence.

A palace-fortress ruin in Indonesia complete with legends of two magical tigers, eight bathing angels, and a wish-granting cannon.

An out-of-place grove of sequoias thrives in northern Spain.

An ancient stone fortress considered by many to be the eighth wonder of the world.

In Spain, the ruins of a Roman military camp sit along a flooded section of a river.

This 18th-century former mosque held the first Hellenic Parliament.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

Kyiv's answer to Muscle Beach is a Soviet-era gym made from scrap metal.

Inside the columbarium, thousands of colorful, high-tech Buddhas guard the ashes of the dead.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

The ruins of an abandoned church mingle with the graves at Oaxaca’s General Cemetery.