Climb right into the heart of this colorful Iceland volcano.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

An Icelandic island full of diving birds and legend.

This stunning concert hall has become a symbol of Iceland's national recovery.

A bit of the Berlin Wall was gifted to the Icelandic capital to commemorate the 25th anniversary of German reunification.

This tiny museum's sizable collection is jammed into a former underground public toilet.

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.

The summer tourists on these cliffs are thousands of seabirds.

Rising from the sea like a stone monster.

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

Rock-cut cave complex filled with ancient Buddhist artwork.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

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

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

The most visited, and possibly most controversial, museum in Germany.

This classic restaurant features a gorgeous mirror-clad room.