This legendary urban waterfall creates a dazzling display of rainbows.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

This black shoreline is made up of exploded lava particles.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

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

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

The remains of the great moral philosopher reside in a university in London.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

A 315-foot spire jutting out from the Blue Ridge Mountains makes for breathtaking views.

The second smallest castle keep in England.

This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

This stimulating sex toy museum is sure to arouse the interest of its visitors.

Oliver Cromwell marched his army over this narrow bridge to victory at the Battle of Preston in 1648.

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

Enter the world under the hill at this ancient UK burial chamber.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

Legends surrounding this megalithic tomb range from giants to a dwarf named Trollid.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.