Give us feedback!

Our philosophy is simple. We want to encourage you to dream. BIG! Then we help you plan your trip, get the most out of it while you're traveling and help you share your experience with friends.

Under the Ground


Dreams Still To Do
Checked-Off Dreams
Dreams Still To Do
Checked-Off Dreams

Explore Under the Ground

  • ADD TO
    LIST
    CHECK
    OFF
    Ride through Seikan Tunnel, Japan

    Ride through Seikan Tunnel, Japan

    The Seikan Tunnel is a 53.85-kilometre (33.46 mi) railway tunnel in Japan, with a 23.3-kilometre (14.5 mi) long portion under the seabed. Track level is about 140 metres (460 ft) below seabed and 240 m (790 ft) below sea level. It travels beneath the Tsugaru Strait—connecting Aomori Prefecture on the Japanese island of Honshu and the island of Hokkaido—as ...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Explore Shannon Cave, Ireland & Northern Ireland

    Explore Shannon Cave, Ireland & Northern Ireland

    Shannon Cave is an active stream passage cave situated in County Fermanagh, Northern Ireland and County Cavan in the Republic of Ireland. At 130 metres (430 ft) vertical depth, it stands joint 6th with Poulnagree in County Clare in the deepest caves of Ireland. The cave is recorded at 5.4 kilometres (3.4 mi) in length (making it 6th longest on the island of Ireland), ...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Explore Shilin Karst (Stone Forest), China (UNESCO site)

    Explore Shilin Karst (Stone Forest), China (UNESCO site)

    The South China Karst, a UNESCO World Heritage Site since June 2007, spans China's southern provinces of Guangxi, Guizhou, and Yunnan. The region of south China is particularly noted for its karst features and landscapes as well as rich biodiversity. The site comprises three clusters: Libo Karst, Shilin Karst and Wulong Karst. UNESCO describes the South China Karst as...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Dive Sistema Dos Ojos Cenotes, Yucatán, Mexico

    Dive Sistema Dos Ojos Cenotes, Yucatán, Mexico

    Dos Ojos (from Spanish meaning "Two Eyes"; officially Sistema Dos Ojos) is a flooded cave system located north of Tulum, on the Caribbean coast of the Yucatán Peninsula, in the state of Quintana Roo, Mexico. The exploration of Dos Ojos began in 1987 and still continues. The surveyed extent of the cave system is 81.9 kilometres / 50.9 miles and there are 28 know...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Dive Sistema Naranjal (Cenote Naharon & Cenote Mayan Blue), Yucatán, Mexico

    Dive Sistema Naranjal (Cenote Naharon & Cenote Mayan Blue), Yucatán, Mexico

    Sistema Naranjal in Yucatán, Mexico includes Cenote Naharon and Cenote Mayan Blue. Sistema Naranjal is most likely part of the much larger Sistema Ox Bel Ha, the world’s largest underwater cave. Cenote Naharon (“the dark cave") is different from other caves in the area with most of its walls and formations are stained a deep black. Cenote Mayan Bl...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Dive Sistema Nohoch Nah Chich (Casa Cenote, Cenote Manati), Yucatán, Mexico

    Dive Sistema Nohoch Nah Chich (Casa Cenote, Cenote Manati), Yucatán, Mexico

    Sistema Nohoch Nah Chich (from Spanish and Yucatec Maya meaning "Giant Birdcage System") is an extensive water filled cave system connected with the Caribbean Sea via a coastal spring called a variety of names, including Casa Cenote for the restaurant located nearby, but also Cenote Manati, or Cenote Tankah. The explored cave system extends to approximately 8 kilomete...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Dive Sistema Ox Bel Ha Cenote, Yucatán, Mexico

    Dive Sistema Ox Bel Ha Cenote, Yucatán, Mexico

    Ox Bel Ha ("Three Paths of Water"), officially Sistema Ox Bel Ha, is a cave system in Quintana Roo, Mexico. It is the longest explored underwater cave in the world and ranking no. 4 including dry caves. As of October 2011 the surveyed length is 231.2 kilometers (143.7 mi) of underwater passages.
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Dive Sistema Sac Actun Cenotes, Yucatán, Mexico

    Dive Sistema Sac Actun Cenotes, Yucatán, Mexico

    Sistema Sac Actun (from Spanish and Yucatec Maya meaning "White Cave System") is an underwater cave system situated along the Caribbean coast of the Yucatán Peninsula with passages to the north and west of the village of Tulum. Exploration started from Gran Cenote 5 kilometers (3.1 mi) west of Tulum. The whole of the presently explored cave system lies within t...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Explore Škocjan Caves, Slovenia (UNESCO site)

    Explore Škocjan Caves, Slovenia (UNESCO site)

    Skocjan Caves is a cave system in Slovenia. Due to its exceptional significance, Škocjan Caves was entered on UNESCO’s list of natural and cultural world heritage sites in 1986. International scientific circles have thus acknowledged the importance of the caves as one of the natural treasures of planet Earth. Ranking among the most important caves in the ...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Take  Slaughter Canyon Cave Tour, Carlsbad Caverns National Park, New Mexico

    Take Slaughter Canyon Cave Tour, Carlsbad Caverns National Park, New Mexico

    Slaughter Canyon Cave is a strenuous adventure tour. Ranger-guided tours of Slaughter Canyon Cave take you into an underground wilderness without electricity, paved walkways, or modern conveniences. In this wild cave, darkness is broken only by the flashlights and headlamps of rangers and tour members. Highlights of the tour may include the 89-foot high Monarch, one o...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Visit Sönghellir Cave, Arnarstapi, Iceland

    Visit Sönghellir Cave, Arnarstapi, Iceland

    Sönghellir (Song Cave) is a cave famed for its echoing quality. It's located near the old fishing village Arnarstapi on the Snæfellsnes peninsula in West Iceland.
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Take Spider Cave Tour, Carlsbad Caverns National Park, New Mexico

    Take Spider Cave Tour, Carlsbad Caverns National Park, New Mexico

    Spider Cave is a three-dimensional maze cave—a caver’s paradise. Even veteran cavers will enjoy the adventure of Spider. Participants will hike a half mile down beautiful Garden Grove Canyon to get to the cave, where excessive crawling and climbing will ensue. Highlights of this tour include the Mace Room, Medusa Room, and Cactus Spring, as well as a stunn...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Take Star Chamber Tour, Mammoth Cave National Park, Kentucky

    Take Star Chamber Tour, Mammoth Cave National Park, Kentucky

    Take an evening journey into Mammoth Cave and experience the cave by lantern light. Learn of the early travels of both guides and visitors in the 1800s. Hear the stories of tuberculosis patients who sought for a cure inside the cave. View numerous rock monuments and signatures left by visitors who sought memorable experiences in Mammoth Cave over a hundred years ago. ...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Explore St. Michael's Cave, Gibraltar

    Explore St. Michael's Cave, Gibraltar

    St Michael's Cave is the name given to a network of limestone caves located in the Upper Rock Nature Reserve of Gibraltar, at a height of over 300 metres above sea level. According to Alonso Hernández del Portillo, the first historian of Gibraltar, its name is derived from a similar grotto in Monte Gargano near the Sanctuary of Monte Sant'Angelo in Apulia, Ital...
    Rate this Dream:
  • ADD TO
    LIST
    CHECK
    OFF
    Hike Surtshellir Lava Tube, Iceland

    Hike Surtshellir Lava Tube, Iceland

    Surtshellir is a lava cave located in western Iceland, around 60 km from the settlement of Borgarnes. Approximately a mile in length, it is the longest such cave in the country. While mentioned in the medieval historical-geographical workLandnámabók, Eggert Ólafsson was the first to give a thorough documentation of the cave in his 1750 travels of ...
    Rate this Dream: