6 Interesting Caves To Visit Around The World

A cave or cavern is a natural underground space large enough for a human to enter. Caves form naturally by the weathering of rock and they often extend deep underground. Because of their uniqueness and beauty, some caves have become very interesting places for tourists and photographers worldwide.

# Sea Cave in Algarve, Portugal

This beautiful sea cave is located near Benagil Beach in the Algarve region of Portugal. As you can see the bottom of the cave is covered with fine sand, and on the roof there is a "window to the sky".

# Crystal Cave, Iceland

This cave in the glacier ice is the result of glacial mill, or Moulin where rain and melt water on the glacier surface are channeled into streams that enter the glacier at crevices. The waterfall melts a hole into the glacier while the ponded water drains towards lower elevations by forming long ice caves with an outlet at the terminus of the glacier.

# Devetashka Cave, Bulgaria

Devetashka cave is one of the biggest caves in Bulgaria but it is most famous for its amazing history. It is also currently home to nearly 30,000 bats. Devetashka cave is located 18 km (11mi) northeast of Lovech and 2 kilometers (1.2mi) away from the village of Devetaki. The cave is also known as Maarata or Oknata for its seven different-sized holes in the ceiling, through which sunlight penetrates and illuminates the central hall and part of its two fields.

# Glow Worm Caves, New Zealand

Waitomo, New Zealand is famous for one thing. Every year, heaps upon heaps of travelers come here to see the infamous glow worms that line the ceilings of the nearby caves. The glow worms emit a phosphorescent glow that shines from the roofs of the caves like a starry night. The interesting thing about the glow worms is that they aren’t really glow worms. They’re fly larvae. And what glows? Well, that’s their waste and snot. The larva glow to attract prey into its threads by making the prey believe they are outdoors as the roof of a cave looks much like a starry night. Hungry larva glow brighter than ones that have just eaten. There are a couple of ways to see the glow worms. There’s the three hour black water tubing trip, the five hour trip that includes abseiling and climbing, or, if you like it easy, a boat.

# Cueva de Arpea, Spain

Cueva de Arpea is located below the twisted rock layers in Aezkoa valley in northern Spain. That area is home to some truly amazing caves. The cave is called in french "caverne d'harpea". It's believed to have been used as a refuge by ancient shepherds since old times.

# Minnehaha Falls Cave, USA

Near where the Minnehaha Creek meets the Mississippi River, a 53 ft (16m) waterfall that freezes during the winter creates a temporary cave behind a wall of ice. Due to the extremely cold temperatures in the area during the winter months, the falls freeze, creating a dramatic cascade of ice that can last well into the spring. Minnehaha Creek is located in Hennepin County, Minnesota that extends from Lake Minnetonka in the west and flows east for 22 miles through several suburbs west of Minneapolis and then through south Minneapolis. Including Lake Minnetonka, the watershed for the creek covers 181 square miles.