Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The remnants of a creative early method of wildfire prevention.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Flames have been burning within this mountain for more than 2,500 years.

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

Hidden just under the waters around this Turkish island are the ruins of a once great city.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This mysterious abandoned fort looks like something pulled right from Arabian legend.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This artificial archipelago was supposed to resemble a map of the world.

Whitewashed mosque contains the world's largest carpet.

A faithful reproduction of Al-Jazari's enormous water clock.

Kuwait City's uniquely designed water towers look straight out of a retro sci-fi cityscape.

This charming, narrow-gauge railway in the Thames Estuary is sometimes referred to as the "Train to Nowhere."

Music boxes like you've never imagined.

A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

An ancient water supply dating back almost 500 years can still be found standing in East Sussex.

Keep a lookout for replicas of this wooden soldier hiding in plain sight all around town.