This ancient limestone cave system contains many impressive geological features.

Home to the oldest operating roller coaster in the Southern Hemisphere.

This work of public art symbolizes the maritime history and the modern creative industry in Fremantle.

This 1800s former railway tunnel is now part of a heritage walking trail.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

An alchemist's "magic door" stands in the middle of a Roman park.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

A surprisingly approachable statue of the man who dominated King Henry VIII's government.

A marvel of Byzantine engineering under the streets of Istanbul.

Angels, demons, and tortured souls on a giant wall mural in a little church.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

A scattered trail of street art adds a pop of color to the city's stark structures.

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

England's most notorious suicide spot.

This monumental gateway marks the northern edge of Brighton and is a welcome sign to all visitors to the seaside city.

An engineering masterpiece, or “Scheme of Madness?”

Visible from both land and sea.

This Western Australian mint was established during the height of the Australian gold rush.

One of the few places in the world home to living stromatolites.

The holes in the world's longest golf course are in a series of different towns.

A beautiful hike through national parks, forests and beaches in Western Australia.

The ruins of a once prosperous power station have become a mouldering seaside gem.