The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

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

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of Paul Revere's historic two lantern warning.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

Giant, friendly pelicans in Central London, the most unlikely of places.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

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

A multi-storied adobe complex has been inhabited for more than a thousand years.

A modern day curiosity cabinet.

The most powerful waterfall in all of Europe.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This natural rock formation features seemingly unnatural vertical ridges that have been blamed on elves.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

This scenic Icelandic lava flow is named for a pair of Berserkers who were murdered, according to a famous Saga.

This black church sits alone among a field of lava rock.

A sulfuric martian landscape that looks far better than it smells.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.