Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

The most alien-looking place on Earth.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

The steepest classic funicular in the world glides along a dizzying incline.

This spectacular track has run continuously since 1882.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

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

The world's largest reflecting pool is just two centimeters deep.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

This whimsical fountain pays tribute to Toronto's four-legged friends.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

The legendary building that needed ghostly approval before being built.

Historic funicular railway, believed to be the shortest railroad in the world.

Cambria's most unique B&B features creative surroundings and fantastic food.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

This giant wooden treehouse within a sprawling garden has its own eatery.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

A unique museum where guests can rent and operate a locomotive.

Flaming barrels of tar race through these village streets on Bonfire Night, a tradition that dates back centuries.