This landmark cemetery in Boston was created more than 300 years ago.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Millions of numbers carved in glass represent the tattoos forced upon victims.

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

Inside houses a vast collection of military aircraft and missiles spanning the ages.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This classic steam-powered train takes tourists on a nostalgic trip around the Connecticut River Valley.

The world's first ice hotel is still one of the most elaborate and beautiful.

The show's fictional Korean medical camp was created in the Santa Monica hills.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

Its collection includes a broad array of social, geographic, graphic design, and political history.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Monasteries on rock pillars, once accessible only by frayed ropes.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

A striking symbol of the Bulgarian capital.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

A fountain standing as a testament to a doomed alliance.

Large miniature theme park with 100-plus models.

A marvel of Byzantine engineering under the streets of Istanbul.

These unusual rooms on wheels are holdovers from the 1960s.