A tunnel of hardened lava along Maui’s famous Road to Hana.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

When Croatia became independent of Yugoslavia, the splintering governments left behind these concrete tunnels.

Gigantic unfinished stupa and the world's 2nd largest bell.

A limestone wonderland of water and subterranean secrets.

A beautiful final resting place for some of the noteworthy deceased.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

The palatial McDonald's that inspired Wesley Willis.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Watch the newest land on the planet form before your eyes.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

This black shoreline is made up of exploded lava particles.

A controversial memorial at the place where Captain Cook met his violent end.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Historic medieval fortified city in southwest France.

An extraordinary "City of Caves" carved from solid stone.

Modest by day, illuminated majestically at sunset.

This bright pink Gandhi memorial was built so that sunshine hits a specific spot on his birthday.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

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

3,000 market stands in five former Zeppelin hangars.

An underground city of salt.