Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

The bell that once tolled atop a lost Edinburgh gate now hangs for all to see.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A sweet symbol marks the place where torturous executions were once carried out.

Elaborate tile work in this railway station tells the story of Portugal.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

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

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

A bibliophile's heaven that contains hundreds of bookstores, offering over a third of secondhand books for sale in Tokyo.

A Buddhist temple to honor insects that died for science.

Once a black market electronics marketplace, now an otaku shopper's paradise.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Japanese national treasure originally built in 593 CE.

Peace Park and the Atomic Bomb Dome.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

God's Saharan sandbox of wrath.

Vast stretch of tide-pools with a unique Moroccan charm.

Traditional 11th-century outdoor tannery.