An adventure of a lifetime does not have to be expensive. Sometimes the most memorable ones barely touch - let alone break - the bank. There are plenty of adventurous, inexpensive activities around the globe that are way better than lounging in a luxurious hotel. Some of these activities involve the wonders of nature; from water sports to jumping from the sky. Listed below are the cheapest adventurous activities to enjoy around the globe.

10 Explore The Longest Cave System, Kentucky

Located in Kentucky, USA is the most extensive cave system in the world - Mammoth Cave National Park. Currently, the length of the cave that has been surveyed is more than 680 km, and it is said that there’s more to that. Numerous guided tours can take visitors here, it is highly advised for visitors to book for early reservation as the tour availability depends on the season. Standard guided tours prices range from $6 to $8, while more difficult tours have a higher cost of up to $55.

RELATED: The Tastiest Potato Dishes From Around The Globe

9 Kayaking In Sea Cave, Wisconsin

A natural wonder in Wisconsin, near Minneapolis and Chicago, is the iconic rock formations of Apostle Islands’ sea caves. It is a gem of the Pacific Coast where visitors can explore through a kayak. Aside from its evocative geological formations, the cave features beautiful sunset views through the limestone archways. Guided tours’ price ranges from $40 to $110 depending on the duration of the tour. The standard tour lasts for 2 hours while the challenging one lasts for 4 hours.

8 Skydiving, Florida

Without skydiving, what would a list of adventure excursions be? Skydivers in Key West, Florida, reach speeds exceeding over 120 mph before slowly descending to the Ground after the canopy is released. While flying, skydivers might observe unusual birds and dolphins. Package price starts at $24 to $265, it already comes with the flying equipment as well as the short briefing before jumping out of the plane. All skydivers are required to bring an ID, must have a maximum weight of 270lbs and minimum age of 18.

7 Get a closer view of a Volcano, Hawaii

Hawaii Volcanoes National Park is home to the most beautiful natural wonders, the Mauna Loa and Kilauea. Mauna Loa is known for being the world’s largest active volcano, while Kilauea erupted in 2008 and is no longer releasing lava but is open to the public. The best time to view the eruption is at night featuring the sparkling night sky. The passes, which cost $25 per vehicle, are valid for seven days. Aside from the beautiful volcanoes, there are also other attractions to visit within the park.

RELATED: Surprising Origins Of Popular Food From Across The Globe

6 Whitewater Rafting, Wyoming

Snake River offers an 8-mile whitewater rafting adventure, a perfect adventurous activity to do during summer in Jackson Hole, Wyoming. This activity in Snake River is available for all ages because the water is only in Class III. Trips available are Classic Paddle Raft, a 12-14 person raft ranging from $85 to $100; while Small Boat Paddle Raft is an 8 person raft with a price of $110. There is also a 16-mile continuous scenic float and whitewater combo, though it is slightly pricier than the 8-mile raft.

5 Canyoneering, Philippines

The picturesque waterfalls of Kawasan Badian National Park in Cebu, are well-known throughout the Philippines. Kawasan Falls, amongst the most stunning waterfalls in the world, also provides good exposure to canyoneering for novices because many tours do not require abseiling or climbing equipment. The entire adventure comprises swimming, cliff diving, hiking, climbing, etc. It is highly affordable with a total cost of $30, inclusions are transportation, entrance fee, and a tour guide. The entire adventure lasts for 5 to 6 hours.

4 Ziplining, Spain

One of the best and amazing zip lines in the world is located in Toledo, Spain. The zip lines run over 180 meters across the beautiful UNESCO World Heritage Site, parallel to the San Martin Bridge, and allow guests to glide from across the Tajo River. The minimum age for this activity is 6 years old. This activity costs $14 per person including all the safety equipment and a duration of 30 minutes. Passengers must also wear comfortable clothes and closed shoes.

RELATED: Dark Secrets About Art Forgery And Missing Works Of Art Across The Globe

3 Paragliding, South Korea

South Korea is an ideal location for paragliding for having magnificent land and a mountainous nation. The finest season to go paragliding would be during cherry blossom season in early April or when the forest leaves begin to turn golden at the end of October or beginning of November. There are several paragliding clubs around the country and one can be found near Daegu. This activity costs from $94.5-$121.2 depending on the duration, the longest duration is 40 minutes.

2 Surfing, Indonesia

Bali is famous for its densely forested volcanic highlands, signature rice fields, beaches, coral reefs, surfing, and Hindu traditions. Bali surfing has been most recognized for its excellent bounding left-hand coral breaks. One of the ideal areas in Bali for surfing is Kuta Beach, wherein it offers surf lessons for $26 including the surfboard and rash vest. The UP2U Surf School Bali provides the greatest surfing lessons for beginners and it costs only $9 including surf equipment, clothing, open showers, etc.

1 Extreme Biking, Spain

Biking is a popular adventurous activity around the globe. Spain is one of the most affordable of the well-known Western European tourist attractions. Accordingly, it has a lot to offer to cyclists who enjoy riding their bikes. Mountains and beaches, cities and villages, and one of Europe's lowest population densities can all be found here. What’s more convenient with this activity is that it is free. One of the best routes to go biking in Spain is Vía Verde de Ojos Negros from Teruel to Valencia.

NEXT: 15 Photos of Strange Archaeological Finds From Around Globe (That Offer No Explanation)