An enormous, 30-story-deep hole in the middle of Guatemala City.

An Australian lake whose pink hue defies scientific explanation.

One of the world's southernmost bars.

Largest cave system in Africa.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

The hermits of Karoulia protect their asocial lifestyles by living on the vertical face of a treacherous precipice.

The original "capsule building" is a masterpiece of Metabolist architecture.

An enormous concrete structure built over a nuclear crater.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

From Ancient Rome to WWII, Neupfarrplatz has over 2,000 years of history underneath its main square.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

Go surfing on this urban wave, "hacked" by local surfers.

Tropical paradise strewn with hundreds of World War II wrecks.

The watery grave of Captain Bligh's famous ship.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Off-limits and full of venomous pit vipers, Brazil’s Snake Island has a frighteningly apt nickname.