Water Droplets on Hawthorn

I've been trying to take a photo of water droplets with the background focused in the droplet. This is my best attempt so far. Have you got any suggestions how I can take a better shot?

Common Orange Lichen

This morning I walked to Witham Park to experiment with a new camera. I photographed this lichen hoping to identify it, but my book isn't very clear. Does anyone recognise it?

Update: thanks to everyone who helped identify the lichen. It's Common Orange Lichen (Xanthoria parietina).

Beck Head Stream Cave

After climbing down about 3m in a tight rift and wriggling another 5m through a low passage, Beck Head Stream Cave opens out onto the sandy bank of an underground stream.

Not wanting to take my camera any further I took this one photo before braving the icy waters! After wading for ages upstream the passage reaches an underground waterfall and the end of my exploration, Broadbent Falls.

The River Witham Frozen Over

Here's something I don't see very often. The tidal River Witham froze over a couple of nights ago. As the tide went out, the river left sheets of broken ice on the banks, freezing over again at low tide.

Taken by my camera phone from the footbridge near Boston Stump.

Dawn Over Snowy Fields

Not as much snow as some of you have, but this is how it looks here.

Frost Crystals

There were some great guesses, but no-one mentioned the specific word I was looking for, frost.