From Reykjavik: Golden Circle, Kerid, & Secret Lagoon Tour

Embark on a bus tour of Iceland’s legendary Golden Circle and soak in the thermal waters of the Secret Lagoon. Explore the southwest, including the spectacular Geysir area, Gullfoss Waterfall, Kerið Volcano, and Þingvellir National Park.
After pickup in central Reykjavik, the day's first stop is at the Kerið Volcanic Crater. Here you can circle the crater top along a winding path and descend into the crater to reach the lake at its center.
Next, head to the Secret Lagoon where you'll have 1.5 hours to unwind in the thermal waters and admire the peaceful surroundings.
Continue to the active hot spring of Strokkur and watch it spout steaming water 30 meters every 8 minutes. Arrive at Gullfoss Waterfall and feel the spray of the glacial Hvítá River as it plummets down into a 32-meter-deep crevice.
Next, visit Þingvellir National Park, where the North American and Eurasian tectonic plates are pulling apart at a rate of a few centimeters every year. Þingvellir was named a UNESCO World Heritage Site in 2004.