A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

Have tea in a cemetery with a dazzling view of Istanbul.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

The most metal church of all time was built in record time because of an international, pious pissing contest.

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

Turkish adventurer antiques in the heart of the Grand Bazaar.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

An abandoned Soviet-era mining town in the mountains of South Kazakhstan.

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

A tiny slice shop hides down an unmarked hallway in a Las Vegas casino.

A homage to the King at the hotel where he revived his career.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

A piece of the iconic wall found an unlikely new home in a Vegas bathroom.

Byzantine emperors ruled, lived, and died in this 13th-century palace-turned-museum.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

Quite possibly the oldest love poem known to humankind.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

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

A sixth-century Byzantine cistern hidden below a modern carpet store.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

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