The platform atop this verdant volcano was built with the help of a royal elephant.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

A very classy 1920s-era bar right in Grand Central Station.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

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.