Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

This sacred cave temple is home to thousands of bats and according to legend, a giant snake king.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

Hindu temple of the dead home to hundreds of long-tailed macaques.

One of the holiest places in the region, devotees come to Tirta Empul to bathe in the holy spring water.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This futuristic building is yet another architectural wonder in Dubai.

The world's largest frame offers spectacular views of the city's past and present.

This artificial archipelago was supposed to resemble a map of the world.

The world's seventh-largest coral reef contains an incredible amount of biodiversity.

An icon of the city, this chapel features an amazing dome ceiling and offers panoramic views.

This abandoned naval battery stood at the ready as recently as the 1980s.

This small, lush island has a long and bloody history.

This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.

This Dakar museum exhibits artworks and artifacts honoring the daily lives of Senegalese women.

This deceptively salty lake looks like blushing pink lemonade.

Despite a fraught and controversial history this African island holds a powerful monument to the tragedy of the slave trade.

This enormous censer uses a pulley system installed over 400 years ago.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

The famous facade of Grand Central Terminal hides a regulation tennis court, and it's not the first one.