Stuck in a bygone era, the oldest subterranean shopping street in Japan hides beneath the popular Asakusa district of Tokyo.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

Home of the infamous Rug Man of Doha.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

The highest peak in Utah is the hardest to reach, but only if explorers choose the hard way.

A century-old network of freight tunnels underneath the city's historic business district.

A community of collapsing homes more than a mile out from the Florida coast.

The best Tiki bar in Las Vegas.

Most-visited and most-photographed slot canyon in the American Southwest.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Rippling sand dunes frozen in the Arizona rock.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

An abandoned guano-mining city in the South Pacific.

This cave holds a surprisingly colorful variety of geological oddities.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

A marvel of Byzantine engineering under the streets of Istanbul.

Rising from the sea like a stone monster.

Roman ruins top white travertine terraces formed by ancient hot springs.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.