Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

Sample sweets at an Art Nouveau candy shop that's been in business since 1874.

A few steps from the site of the Tlatelolco massacre, this museum tells the story of Mexico's 1968 student protests.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

An incredible collection of Mesoamerican art assembled by one of Mexico's great artists.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

One of the newest mosques in a city filled with thousands.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

A section of the long chain that blocked enemy ships from entering Constantinople.

Ancient serpentine sacrifice holder that has stood the test of time.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

1513 Turkish world map, full of European state secrets and snarky commentary.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

This isolated and westernmost point of the Faroe Islands archipelago is home to thousands of seabirds.

The narrow passages will challenge even the bravest driver.

Located more than 600 feet beneath sea level, this tunnel boasts the world's first undersea roundabout.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

This Stone Age solar temple aligns with the sun on each equinox and solstice.