Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

The 10,000 Torii shrine.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A neo-Gothic temple in central Mexico featuring a labyrinthine network of crypts.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

One of the biggest markets in Asia, under one of the continent's largest domes.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Vietnam's largest Buddha statue depicts a female sage.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Have fun at the world's first Buddhist waterslide park.

This French colonial post office is arguably the grandest in all of Southeast Asia.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Dive into an undersea optical illusion off the coast of Mauritius.

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

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

A natural dome made of volcanic glass in Inyo National Forest.

Towering basalt columns, a creation of fire and ice.

A volcanic spur of Lake Tahoe wrapped in Washoe sacred stories and road tunnels

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.