Skyscraper powered by wind turbines attached between its towers.

This beautifully historic Bahrain fortress might not be the most popular attraction around, but that might make it all the better.

Mexico City's largest market contains a Willy Wonka-esque wonderland.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

This clock was gifted to Mexico as a show of gratitude for its long history of welcoming Arab migrants.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

The only castle in North America to ever house European sovereigns.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Frida Kahlo's childhood home, now a museum of her life and works.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

1513 Turkish world map, full of European state secrets and snarky commentary.

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

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.

This replica of the Greek structure is in the heart of Nashville.

This park offers a variety of sights and activities including trail rides and buffalo sightings.

Elvis's own personal tropical hideaway.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Home to drunken tower-climbing goats... seriously.

Walk the whole Mississippi River!

Mass graves and Victorian monuments mark the history of Memphis in this 19th century cemetery.

This homegrown adoption center offers a wonderland of feline companionship.