A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

No matter how many times this community-run sauna gets destroyed, it always rises from the ashes.

A clear blue swimming hole with hidden caves, still unexplored.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

This former hydraulic laboratory is now a woodland dotted with old engineering models.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

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

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

This mom-and-pop Japanese sweets shop has been serving cloud-light mochi for almost a century.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

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

A once-glowing grotto at the bottom of Waikapalae Wet Cave.

Submerged lava formations create incredible waterworks.

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

This maze-like slot canyon is a unique gem within an already fascinating geological area.

This tangled English forest looks like something right out of a fairytale.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Rare recess caves fill this unbelievably beautiful Ohio park.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.