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

The world's brightest bioluminescent bay.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The palace of the King of Kings, burned by Alexander the Great.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

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

Shop the world's largest number of ice cream flavors, ranging from delightful to downright bizarre.

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

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

An artsy hidden staircase leads to breathtaking views of San Francisco.

From the Difference Engine to the Cray-1, all under one roof.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The hallucinogenic center of the ancient world.

Ozymandias’ time-keeping temple.

A faux desert landscape in the middle of the jungle that sprouts oases during the rainy season.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

The Uros people live on floating reed islands in lake Titicaca.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

White llama terraces dazzle in Peru's "other Machu Picchu."

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

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

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.