A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Breathtaking and huge 430 year old maps of Italy.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Only known mainland rookery of the threatened Stellar sea lion.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

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

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

An accidentally hidden library containing the ephemeral history of New York.

Pilgrimage site for star-crossed lovers.

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

2300-year-old Roman road connecting the empire.

100-year-old shipwreck you can walk up to at low tide.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Home to three historic ships from the age of Vikings.

This massive redwood tree has a hole in the base big enough to drive through.

This cemetery features modernist statues as strange as its name.

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

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A wall of chewing gum moonlights as collective art.

This expansive bridge in the Canadian wilderness was originally just built for friends.