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

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

High winds can make this one scary landing.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

The best place for scenic views of the DMZ and North Korea.

Secret North Korean passage discovered below the world's most dangerous border.

Not quite the menace it once was, this monster still has some chops.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

This giant statue is the product of a mixture of corruption, Stalinist architecture, and North Korean manpower.

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

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

A 19th-century architectural masterpiece with ties to Gustave Eiffel.

Rolling sand dunes of the Sahara... in the middle of the Atlantic Ocean.

The same water that fills a luxury resort’s pools feeds these free hot springs in the rainforest.

Semi-recognized center of the world, with many oddities.

This historic Victorian hotel has a scandalous history of affairs and murder.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

Copenhagen's celebrated theme park and gardens.

This mountainside mural of a person carrying a torch was created for the 1994 Winter Olympics.