An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This ancient Egyptian obelisk still bears the wounds of World War I.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

This former luxury resort in Kaua'i is now an abandoned relic.

This WWII plane died a quiet death, and is now a garden eel playground.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

A tunnel of hardened lava along Maui’s famous Road to Hana.

This black shoreline is made up of exploded lava particles.

Considered by many to be one of the most dangerous highways in Alaska.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Four-story concrete hotel never opened to customers.

The ghost town that ended up on Ebay.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

The neighborhood shop is a sort of tiny cactus museum full of exotic specimens you can take home.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

A modern mechanical planetary system, part of a 10,000 year clock.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

A museum dedicated to the alleged Roswell Incident.