Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A marvel of Byzantine engineering under the streets of Istanbul.

A fountain standing as a testament to a doomed alliance.

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

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

A charming beach town in Turkey captures all the colors of the rainbow.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

Giant marble phalluses on the sacred island of antiquity.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

The ancient latrines of the Greeks, in all their public glory.

This medieval city gate is now a blend of the past and the modern world.

Pompeii's less famous neighbor is still revealing her secrets.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

This is one of the last remaining theatres in Canada to feature an Art Moderne architectural style.

An abandoned 1970s theme park that has been turned into a space for waterfront walking.

Canada's largest dinosaur skeleton was hidden away in storage for more than 40 years.

Though many were skeptical at first, these animal-specific routes across the Trans-Canada Highway have been a major conservation success.

This unique bridge has been a staple across the Saskatchewan River Valley for more than 100 years.

This giant roadside fruit is home to an array of apple-based treats.