This was once the center of the Birdman cult, and is now a World Heritage Site.

The world's most remote airport.

The largest stone moai on Rapa Nui.

This large round boulder is said to emit spiritual power, but it may just be magnets.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Copenhagen's celebrated theme park and gardens.

This one has sailed five times as far as Sir Francis Drake's famous ship.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

An encyclopedic collection of mammal penises.

This beautiful, historic church looks like something out of a simpler past.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Medicinal spa created with the discharge from a geothermal energy plant.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Breathtaking and huge 430 year old maps of Italy.

Hear the quietest sound from across the dome.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Go inside to really appreciate this 500-year-old technological masterpiece.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Elevated freight railway turned wildly successful urban park.

Famously misunderstood wonder of the ancient world