Cave Stream

{{Short description|Cave in New Zealand}}

{{Use New Zealand English|date=April 2024}}

{{Use dmy dates|date=April 2025}}

{{More citations needed|date=March 2007}}

{{Infobox Cave

| name = Cave Stream

| other_name = Broken River Cave

| photo = Cave Stream 01, New Zealand.jpg

| photo_caption = Downstream opening of the tunnel

| location = Canterbury region, New Zealand

| depth =

| length = {{convert|594|m}}

| survey =

| discovery =

| geology =

| entrance_count = 2

| difficulty = Easy

| hazards =

| access = State Highway 73

}}

Cave Stream, also known as Broken River Cave, is a {{convert|594|m}} long cave in New Zealand, located on State Highway 73.{{cite book |last1=Smith |first1=Nick |last2=New Zealand Speleological Society |title=The New Zealand Cave Atlas, Volume 2 South Island |edition=2004 |year=2004 |publisher=New Zealand Speleological Society |location=Waitomo, N.Z |oclc=156787349}} It is {{convert|40|km|sigfig=1}} from Arthur's Pass and {{convert|100|km|sigfig=2}} from Christchurch.

It is a popular site for passing tourists, however in spring and during heavy rains it can be dangerous to enter the cave. There have been two deaths in the cave, one due to drowning and one to hypothermia. The cave is easy to explore when the river is low. There is a minor waterfall to climb at the far end, although bolts and chains make this easy to negotiate.